diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
index 4080a7eabca..685bf85be75 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
@@ -123,16 +123,16 @@ Y.extend(DIALOGUE, Y.Panel, {
      * @method initializer
      * @return void
      */
-    initializer : function(config) {
+    initializer : function() {
         var bb;
 
-        if (config.render && !this.get('rendered')) {
+        if (this.get('render') && !this.get('rendered')) {
             this.render();
         }
 
         this.makeResponsive();
         this.after('visibleChange', this.visibilityChanged, this);
-        if (config.center) {
+        if (this.get('center')) {
             this.centerDialogue();
         }
         this.set('COUNT', COUNT);
@@ -145,10 +145,10 @@ Y.extend(DIALOGUE, Y.Panel, {
         // and allow setting of z-index in theme.
         bb = this.get('boundingBox');
 
-        if (config.extraClasses) {
-            Y.Array.each(config.extraClasses, bb.addClass, bb);
-        }
-        if (config.visible) {
+        // Add any additional classes that were specified.
+        Y.Array.each(this.get('extraClasses'), bb.addClass, bb);
+
+        if (this.get('visible')) {
             this.applyZIndex();
         }
         // Recalculate the zIndex every time the modal is altered.
@@ -157,7 +157,7 @@ Y.extend(DIALOGUE, Y.Panel, {
         // either by centerDialogue or makeResonsive. This is because the show() will trigger
         // a focus on the dialogue, which will scroll the page. If the dialogue has not
         // been positioned it will scroll back to the top of the page.
-        if (config.visible) {
+        if (this.get('visible')) {
             this.show();
             this.keyDelegation();
         }
@@ -502,6 +502,17 @@ Y.extend(DIALOGUE, Y.Panel, {
          */
         responsiveWidth : {
             value : 768
+        },
+
+        /**
+         * Any additional classes to add to the boundingBox.
+         *
+         * @attributes extraClasses
+         * @type Array
+         * @default []
+         */
+        extraClasses: {
+            value: []
         }
     }
 });
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
index 3c2c9400061..c7fbed90007 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
@@ -1 +1 @@
-YUI.add("moodle-core-notification-dialogue",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle dialogue",c,h=n+"-fullscreen",p=n+"-hidden",d=" [role=dialog]",v="[role=menubar]",m=".moodle-has-zindex",g='input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';c=function(t){var n=e.clone(t);i++;var r="moodle-dialogue-"+i;n.notificationBase=e.Node.create('<div class="'+f.BASE+'">').append(e.Node.create('<div id="'+r+'" role="dialog" aria-labelledby="'+r+'-header-text" class="'+f.WRAP+'"></div>').append(e.Node.create('<div id="'+r+'-header-text" class="'+f.HEADER+' yui3-widget-hd"></div>')).append(e.Node.create('<div class="'+f.BODY+' yui3-widget-bd"></div>')).append(e.Node.create('<div class="'+f.FOOTER+' yui3-widget-ft"></div>'))),e.one(document.body).append(n.notificationBase),n.additionalBaseClass&&n.notificationBase.addClass(n.additionalBaseClass),n.srcNode="#"+r,n.render=typeof n.render!="undefined"?n.render:!0,n.width=n.width||"400px",typeof n.center=="undefined"?n.center=!0:n.center=n.centered&&!0,n.centered=!1,n.COUNT=i,n.width==="auto"&&delete n.width,n.lightbox!==!1&&(n.modal=!0),delete n.lightbox,n.closeButton===!1?n.buttons=null:n.buttons=[{section:e.WidgetStdMod.HEADER,classNames:"closebutton",action:function(){this.hide()}}],c.superclass.constructor.apply(this,[n]),n.closeButton!==!1&&this.get("buttons").header[0].setAttribute("title",this.get("closeButtonTitle"))},e.extend(c,e.Panel,{_resizeevent:null,_orientationevent:null,_calculatedzindex:!1,initializer:function(t){var n;t.render&&!this.get("rendered")&&this.render(),this.makeResponsive(),this.after("visibleChange",this.visibilityChanged,this),t.center&&this.centerDialogue(),this.set("COUNT",i),this.get("modal")&&this.plug(e.M.core.LockScroll),n=this.get("boundingBox"),t.extraClasses&&e.Array.each(t.extraClasses,n.addClass,n),t.visible&&this.applyZIndex(),this.on("maskShow",this.applyZIndex),t.visible&&(this.show(),this.keyDelegation())},applyZIndex:function(){var t=1,n=1,r=this.get("boundingBox"),i=this.get("maskNode"),s=this.get("zIndex");s!==0&&!this._calculatedzindex?r.setStyle("zIndex",s):(e.all(d+", "+v+", "+m).each(function(e){var n=this.findZIndex(e);n>t&&(t=n)},this),n=(t+1).toString(),r.setStyle("zIndex",n),i.setStyle("zIndex",n),this.set("zIndex",n),this._calculatedzindex=!0)},findZIndex:function(e){var t=e.getStyle("zIndex")||e.ancestor().getStyle("zIndex");return t?parseInt(t,10):0},visibilityChanged:function(t){var n,r;t.attrName==="visible"&&(this.get("maskNode").addClass(f.LIGHTBOX),t.prevVal&&!t.newVal&&(r=this.get("boundingBox"),this._resizeevent&&(this._resizeevent.detach(),this._resizeevent=null),this._orientationevent&&(this._orientationevent.detach(),this._orientationevent=null),r.detach("key",this.keyDelegation)),!t.prevVal&&t.newVal&&(this.applyZIndex(),this.makeResponsive(),this.shouldResizeFullscreen()||this.get("draggable")&&(n="#"+this.get("id")+" ."+f.HEADER,this.plug(e.Plugin.Drag,{handles:[n]}),e.one(n).setStyle("cursor","move")),this.keyDelegation()),this.get("center")&&!t.prevVal&&t.newVal&&this.centerDialogue())},makeResponsive:function(){var t=this.get("boundingBox"),n;this.shouldResizeFullscreen()?(t.addClass(h),t.setStyles({left:null,top:null,width:null,height:null,right:null,bottom:null}),n=e.one("#"+this.get("id")+" ."+f.BODY)):this.get("responsive")&&(t.removeClass(h).setStyles({width:this.get("width"),height:this.get("height")}),n=e.one("#"+this.get("id")+" ."+f.BODY))},centerDialogue:function(){var t=this.get("boundingBox"),n=t.hasClass(p),r,i;if(this.shouldResizeFullscreen())return;n&&t.setStyle("top","-1000px").removeClass(p),r=Math.max(Math.round((t.get("winWidth")-t.get("offsetWidth"))/2),15),i=Math.max(Math.round((t.get("winHeight")-t.get("offsetHeight"))/2),15)+e.one(window).get("scrollTop"),t.setStyles({left:r,top:i}),n&&t.addClass(p)},shouldResizeFullscreen:function(){return window===window.parent&&this.get("responsive")&&Math.floor(e.one(document.body).get("winWidth"))<this.get("responsiveWidth")},show:function(){var e=null,t=this.headerNode,n=this.bodyNode;return this.lockScroll&&this.lockScroll.enableScrollLock(),e=c.superclass.show.call(this),t&&t!==""?t.focus():n&&n!==""&&n.focus(),e},hide:function(){return this.lockScroll&&this.lockScroll.disableScrollLock(),c.superclass.hide.call(this,arguments)},keyDelegation:function(){var e=this.get("boundingBox");e.delegate("key",function(e){var t=e.target,n="forward";e.shiftKey&&(n="backward"),this.trapFocus(t,n)&&e.preventDefault()},"down:9",g,this)},trapFocus:function(e,t){var n=this.get("boundingBox"),r=n.one(g),i=n.all(g).pop();if(e===i&&t==="forward")return r.focus();if(e===r&&t==="backward")return i.focus()}},{NAME:l,CSS_PREFIX:n,ATTRS:{notificationBase:{},lightbox:{validator:e.Lang.isBoolean,value:!0},closeButton:{validator:e.Lang.isBoolean,value:!0},closeButtonTitle:{validator:e.Lang.isString,value:"Close"},center:{validator:e.Lang.isBoolean,value:!0},draggable:{validator:e.Lang.isBoolean,value:!1},COUNT:{value:0},responsive:{validator:e.Lang.isBoolean,value:!0},responsiveWidth:{value:768}}}),M.core.dialogue=c},"@VERSION@",{requires:["base","node","panel","event-key","dd-plugin","moodle-core-lockscroll"]});
+YUI.add("moodle-core-notification-dialogue",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle dialogue",c,h=n+"-fullscreen",p=n+"-hidden",d=" [role=dialog]",v="[role=menubar]",m=".moodle-has-zindex",g='input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';c=function(t){var n=e.clone(t);i++;var r="moodle-dialogue-"+i;n.notificationBase=e.Node.create('<div class="'+f.BASE+'">').append(e.Node.create('<div id="'+r+'" role="dialog" aria-labelledby="'+r+'-header-text" class="'+f.WRAP+'"></div>').append(e.Node.create('<div id="'+r+'-header-text" class="'+f.HEADER+' yui3-widget-hd"></div>')).append(e.Node.create('<div class="'+f.BODY+' yui3-widget-bd"></div>')).append(e.Node.create('<div class="'+f.FOOTER+' yui3-widget-ft"></div>'))),e.one(document.body).append(n.notificationBase),n.additionalBaseClass&&n.notificationBase.addClass(n.additionalBaseClass),n.srcNode="#"+r,n.render=typeof n.render!="undefined"?n.render:!0,n.width=n.width||"400px",typeof n.center=="undefined"?n.center=!0:n.center=n.centered&&!0,n.centered=!1,n.COUNT=i,n.width==="auto"&&delete n.width,n.lightbox!==!1&&(n.modal=!0),delete n.lightbox,n.closeButton===!1?n.buttons=null:n.buttons=[{section:e.WidgetStdMod.HEADER,classNames:"closebutton",action:function(){this.hide()}}],c.superclass.constructor.apply(this,[n]),n.closeButton!==!1&&this.get("buttons").header[0].setAttribute("title",this.get("closeButtonTitle"))},e.extend(c,e.Panel,{_resizeevent:null,_orientationevent:null,_calculatedzindex:!1,initializer:function(){var t;this.get("render")&&!this.get("rendered")&&this.render(),this.makeResponsive(),this.after("visibleChange",this.visibilityChanged,this),this.get("center")&&this.centerDialogue(),this.set("COUNT",i),this.get("modal")&&this.plug(e.M.core.LockScroll),t=this.get("boundingBox"),e.Array.each(this.get("extraClasses"),t.addClass,t),this.get("visible")&&this.applyZIndex(),this.on("maskShow",this.applyZIndex),this.get("visible")&&(this.show(),this.keyDelegation())},applyZIndex:function(){var t=1,n=1,r=this.get("boundingBox"),i=this.get("maskNode"),s=this.get("zIndex");s!==0&&!this._calculatedzindex?r.setStyle("zIndex",s):(e.all(d+", "+v+", "+m).each(function(e){var n=this.findZIndex(e);n>t&&(t=n)},this),n=(t+1).toString(),r.setStyle("zIndex",n),i.setStyle("zIndex",n),this.set("zIndex",n),this._calculatedzindex=!0)},findZIndex:function(e){var t=e.getStyle("zIndex")||e.ancestor().getStyle("zIndex");return t?parseInt(t,10):0},visibilityChanged:function(t){var n,r;t.attrName==="visible"&&(this.get("maskNode").addClass(f.LIGHTBOX),t.prevVal&&!t.newVal&&(r=this.get("boundingBox"),this._resizeevent&&(this._resizeevent.detach(),this._resizeevent=null),this._orientationevent&&(this._orientationevent.detach(),this._orientationevent=null),r.detach("key",this.keyDelegation)),!t.prevVal&&t.newVal&&(this.applyZIndex(),this.makeResponsive(),this.shouldResizeFullscreen()||this.get("draggable")&&(n="#"+this.get("id")+" ."+f.HEADER,this.plug(e.Plugin.Drag,{handles:[n]}),e.one(n).setStyle("cursor","move")),this.keyDelegation()),this.get("center")&&!t.prevVal&&t.newVal&&this.centerDialogue())},makeResponsive:function(){var t=this.get("boundingBox"),n;this.shouldResizeFullscreen()?(t.addClass(h),t.setStyles({left:null,top:null,width:null,height:null,right:null,bottom:null}),n=e.one("#"+this.get("id")+" ."+f.BODY)):this.get("responsive")&&(t.removeClass(h).setStyles({width:this.get("width"),height:this.get("height")}),n=e.one("#"+this.get("id")+" ."+f.BODY))},centerDialogue:function(){var t=this.get("boundingBox"),n=t.hasClass(p),r,i;if(this.shouldResizeFullscreen())return;n&&t.setStyle("top","-1000px").removeClass(p),r=Math.max(Math.round((t.get("winWidth")-t.get("offsetWidth"))/2),15),i=Math.max(Math.round((t.get("winHeight")-t.get("offsetHeight"))/2),15)+e.one(window).get("scrollTop"),t.setStyles({left:r,top:i}),n&&t.addClass(p)},shouldResizeFullscreen:function(){return window===window.parent&&this.get("responsive")&&Math.floor(e.one(document.body).get("winWidth"))<this.get("responsiveWidth")},show:function(){var e=null,t=this.headerNode,n=this.bodyNode;return this.lockScroll&&this.lockScroll.enableScrollLock(),e=c.superclass.show.call(this),t&&t!==""?t.focus():n&&n!==""&&n.focus(),e},hide:function(){return this.lockScroll&&this.lockScroll.disableScrollLock(),c.superclass.hide.call(this,arguments)},keyDelegation:function(){var e=this.get("boundingBox");e.delegate("key",function(e){var t=e.target,n="forward";e.shiftKey&&(n="backward"),this.trapFocus(t,n)&&e.preventDefault()},"down:9",g,this)},trapFocus:function(e,t){var n=this.get("boundingBox"),r=n.one(g),i=n.all(g).pop();if(e===i&&t==="forward")return r.focus();if(e===r&&t==="backward")return i.focus()}},{NAME:l,CSS_PREFIX:n,ATTRS:{notificationBase:{},lightbox:{validator:e.Lang.isBoolean,value:!0},closeButton:{validator:e.Lang.isBoolean,value:!0},closeButtonTitle:{validator:e.Lang.isString,value:"Close"},center:{validator:e.Lang.isBoolean,value:!0},draggable:{validator:e.Lang.isBoolean,value:!1},COUNT:{value:0},responsive:{validator:e.Lang.isBoolean,value:!0},responsiveWidth:{value:768},extraClasses:{value:[]}}}),M.core.dialogue=c},"@VERSION@",{requires:["base","node","panel","event-key","dd-plugin","moodle-core-lockscroll"]});
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
index 4080a7eabca..685bf85be75 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
@@ -123,16 +123,16 @@ Y.extend(DIALOGUE, Y.Panel, {
      * @method initializer
      * @return void
      */
-    initializer : function(config) {
+    initializer : function() {
         var bb;
 
-        if (config.render && !this.get('rendered')) {
+        if (this.get('render') && !this.get('rendered')) {
             this.render();
         }
 
         this.makeResponsive();
         this.after('visibleChange', this.visibilityChanged, this);
-        if (config.center) {
+        if (this.get('center')) {
             this.centerDialogue();
         }
         this.set('COUNT', COUNT);
@@ -145,10 +145,10 @@ Y.extend(DIALOGUE, Y.Panel, {
         // and allow setting of z-index in theme.
         bb = this.get('boundingBox');
 
-        if (config.extraClasses) {
-            Y.Array.each(config.extraClasses, bb.addClass, bb);
-        }
-        if (config.visible) {
+        // Add any additional classes that were specified.
+        Y.Array.each(this.get('extraClasses'), bb.addClass, bb);
+
+        if (this.get('visible')) {
             this.applyZIndex();
         }
         // Recalculate the zIndex every time the modal is altered.
@@ -157,7 +157,7 @@ Y.extend(DIALOGUE, Y.Panel, {
         // either by centerDialogue or makeResonsive. This is because the show() will trigger
         // a focus on the dialogue, which will scroll the page. If the dialogue has not
         // been positioned it will scroll back to the top of the page.
-        if (config.visible) {
+        if (this.get('visible')) {
             this.show();
             this.keyDelegation();
         }
@@ -502,6 +502,17 @@ Y.extend(DIALOGUE, Y.Panel, {
          */
         responsiveWidth : {
             value : 768
+        },
+
+        /**
+         * Any additional classes to add to the boundingBox.
+         *
+         * @attributes extraClasses
+         * @type Array
+         * @default []
+         */
+        extraClasses: {
+            value: []
         }
     }
 });
diff --git a/lib/yui/src/notification/js/dialogue.js b/lib/yui/src/notification/js/dialogue.js
index 20e41886087..42e9fcd448c 100644
--- a/lib/yui/src/notification/js/dialogue.js
+++ b/lib/yui/src/notification/js/dialogue.js
@@ -92,16 +92,16 @@ Y.extend(DIALOGUE, Y.Panel, {
      * @method initializer
      * @return void
      */
-    initializer : function(config) {
+    initializer : function() {
         var bb;
 
-        if (config.render && !this.get('rendered')) {
+        if (this.get('render') && !this.get('rendered')) {
             this.render();
         }
 
         this.makeResponsive();
         this.after('visibleChange', this.visibilityChanged, this);
-        if (config.center) {
+        if (this.get('center')) {
             this.centerDialogue();
         }
         this.set('COUNT', COUNT);
@@ -114,10 +114,10 @@ Y.extend(DIALOGUE, Y.Panel, {
         // and allow setting of z-index in theme.
         bb = this.get('boundingBox');
 
-        if (config.extraClasses) {
-            Y.Array.each(config.extraClasses, bb.addClass, bb);
-        }
-        if (config.visible) {
+        // Add any additional classes that were specified.
+        Y.Array.each(this.get('extraClasses'), bb.addClass, bb);
+
+        if (this.get('visible')) {
             this.applyZIndex();
         }
         // Recalculate the zIndex every time the modal is altered.
@@ -126,7 +126,7 @@ Y.extend(DIALOGUE, Y.Panel, {
         // either by centerDialogue or makeResonsive. This is because the show() will trigger
         // a focus on the dialogue, which will scroll the page. If the dialogue has not
         // been positioned it will scroll back to the top of the page.
-        if (config.visible) {
+        if (this.get('visible')) {
             this.show();
             this.keyDelegation();
         }
@@ -471,6 +471,17 @@ Y.extend(DIALOGUE, Y.Panel, {
          */
         responsiveWidth : {
             value : 768
+        },
+
+        /**
+         * Any additional classes to add to the boundingBox.
+         *
+         * @attributes extraClasses
+         * @type Array
+         * @default []
+         */
+        extraClasses: {
+            value: []
         }
     }
 });