MDL-64819 output: Hide icons with no title

When output from javascript they should match what gets output from php.

lib/amd/build/icon_system_fontawesome.min.js

@@ -1 +1 @@
-define(["core/icon_system","jquery","core/ajax","core/mustache","core/localstorage","core/url"],function(a,b,c,d,e,f){var g=null,h=null,i=function(){a.apply(this,arguments)};return i.prototype=Object.create(a.prototype),i.prototype.init=function(){if(g)return b.when(this);var a=e.get("core/iconmap-fontawesome");return a&&(a=JSON.parse(a)),a?(g=a,b.when(this)):(null===h&&(h=c.call([{methodname:"core_output_load_fontawesome_icon_map",args:[]}],!0,!1)[0]),h.then(function(a){return g={},b.each(a,function(a,b){g[b.component+"/"+b.pix]=b.to}),e.set("core/iconmap-fontawesome",JSON.stringify(g)),this}.bind(this)))},i.prototype.renderIcon=function(a,b,c,e){var h=g[b+"/"+a],i=!1;if("undefined"==typeof h){var j=f.imageUrl(a,b);i={attributes:[{name:"src",value:j},{name:"alt",value:c},{name:"title",value:c}]}}var k={key:h,title:c,alt:c,unmappedIcon:i},l=d.render(e,k);return l.trim()},i.prototype.getTemplateName=function(){return"core/pix_icon_fontawesome"},i});
+define(["core/icon_system","jquery","core/ajax","core/mustache","core/localstorage","core/url"],function(a,b,c,d,e,f){var g=null,h=null,i=function(){a.apply(this,arguments)};return i.prototype=Object.create(a.prototype),i.prototype.init=function(){if(g)return b.when(this);var a=e.get("core/iconmap-fontawesome");return a&&(a=JSON.parse(a)),a?(g=a,b.when(this)):(null===h&&(h=c.call([{methodname:"core_output_load_fontawesome_icon_map",args:[]}],!0,!1)[0]),h.then(function(a){return g={},b.each(a,function(a,b){g[b.component+"/"+b.pix]=b.to}),e.set("core/iconmap-fontawesome",JSON.stringify(g)),this}.bind(this)))},i.prototype.renderIcon=function(a,b,c,e){var h=g[b+"/"+a],i=!1;if("undefined"==typeof h){var j=f.imageUrl(a,b);i={attributes:[{name:"src",value:j},{name:"alt",value:c},{name:"title",value:c}]}}var k={key:h,title:c,alt:c,unmappedIcon:i};"undefined"!=typeof c&&""!==c||(k["aria-hidden"]=!0);var l=d.render(e,k);return l.trim()},i.prototype.getTemplateName=function(){return"core/pix_icon_fontawesome"},i});

lib/amd/build/icon_system_standard.min.js

@@ -1 +1 @@
-define(["core/icon_system","core/url","core/mustache"],function(a,b,c){var d=function(){a.apply(this,arguments)};return d.prototype=Object.create(a.prototype),d.prototype.renderIcon=function(a,d,e,f){var g=b.imageUrl(a,d),h={attributes:[{name:"src",value:g},{name:"alt",value:e},{name:"title",value:e}]},i=c.render(f,h);return i.trim()},d.prototype.getTemplateName=function(){return"core/pix_icon"},d});
+define(["core/icon_system","core/url","core/mustache"],function(a,b,c){var d=function(){a.apply(this,arguments)};return d.prototype=Object.create(a.prototype),d.prototype.renderIcon=function(a,d,e,f){var g=b.imageUrl(a,d),h={attributes:[{name:"src",value:g},{name:"alt",value:e},{name:"title",value:e}]};"undefined"!=typeof e&&""!=e||h.attributes.push({name:"aria-hidden",value:"true"});var i=c.render(f,h);return i.trim()},d.prototype.getTemplateName=function(){return"core/pix_icon"},d});

lib/amd/src/icon_system_fontawesome.js

@@ -105,6 +105,10 @@ define(['core/icon_system', 'jquery', 'core/ajax', 'core/mustache', 'core/locals
             unmappedIcon: unmappedIcon
         };
 
+        if (typeof title === "undefined" || title === '') {
+            context['aria-hidden'] = true;
+        }
+
         var result = Mustache.render(template, context);
         return result.trim();
     };

lib/amd/src/icon_system_standard.js

@@ -52,6 +52,10 @@ define(['core/icon_system', 'core/url', 'core/mustache'],
                 {name: 'title', value: title}
             ]
         };
+        if (typeof title === "undefined" || title == "") {
+            templatecontext.attributes.push({name: 'aria-hidden', value: 'true'});
+        }
+
         var result = Mustache.render(template, templatecontext);
         return result.trim();
     };