feat: Fix the copied format not being applied to the selected text in…

… some CKEditor instances - EXO-73291 - Meeds-io/MIPs#129 (#647)

Prior to this change, the copied format was not applied to the selected
text in some CKEditor instances. This issue was due to the mouseup event
being attached to the editor document and not being detected. This
change attaches the entire event to the editor's editable element,
resolving the issue.

commons-extension-webapp/src/main/webapp/ckeditor/plugins/copyformatting/plugin.js

@@ -109,6 +109,15 @@
 					}
 				} );
 
+				if (mouseupHost === editor.document) {
+					editable.attachListener( editable, 'mouseup', function( evt ) {
+						// Apply formatting only if any styles are copied (#2780, #2655, #2470).
+						if ( getMouseButton( evt ) === CKEDITOR.MOUSE_BUTTON_LEFT && cmd.state === CKEDITOR.TRISTATE_ON ) {
+							editor.execCommand( 'applyFormatting' );
+						}
+					} );
+				}
+
 				editable.attachListener( CKEDITOR.document, 'mouseup', function( evt ) {
 					if ( getMouseButton( evt ) === CKEDITOR.MOUSE_BUTTON_LEFT && cmd.state === CKEDITOR.TRISTATE_ON &&
 						!editable.contains( evt.data.getTarget() ) ) {