MDL-74741 javascript: Set the role of d&d links to button

lib/yui/build/moodle-core-dragdrop/moodle-core-dragdrop-debug.js

@@ -471,6 +471,7 @@ Y.extend(DRAGDROP, Y.Base, {
                 listlink.setAttribute('data-drop-target', node.get('id'));
                 // Allow tabbing to the link.
                 listlink.setAttribute('tabindex', '0');
+                listlink.setAttribute('role', 'button');
 
                 // Set the event listeners for enter, space or click.
                 listlink.on('click', this.global_keyboard_drop, this);

lib/yui/build/moodle-core-dragdrop/moodle-core-dragdrop.js

@@ -471,6 +471,7 @@ Y.extend(DRAGDROP, Y.Base, {
                 listlink.setAttribute('data-drop-target', node.get('id'));
                 // Allow tabbing to the link.
                 listlink.setAttribute('tabindex', '0');
+                listlink.setAttribute('role', 'button');
 
                 // Set the event listeners for enter, space or click.
                 listlink.on('click', this.global_keyboard_drop, this);

lib/yui/src/dragdrop/js/dragdrop.js

@@ -469,6 +469,7 @@ Y.extend(DRAGDROP, Y.Base, {
                 listlink.setAttribute('data-drop-target', node.get('id'));
                 // Allow tabbing to the link.
                 listlink.setAttribute('tabindex', '0');
+                listlink.setAttribute('role', 'button');
 
                 // Set the event listeners for enter, space or click.
                 listlink.on('click', this.global_keyboard_drop, this);