Dialog: Don't focus dialog when mousedown is on close button. Fixes #8838 - Dialog: Close icon does not work in dialog larger than the window in IE.

Author: jzaefferer

ui/jquery.ui.dialog.js

@@ -321,9 +321,14 @@ $.widget("ui.dialog", {
 			.addClass( "ui-dialog-titlebar  ui-widget-header ui-corner-all  ui-helper-clearfix" )
 			.prependTo( this.uiDialog );
 		this._on( this.uiDialogTitlebar, {
-			mousedown: function() {
-				// Dialog isn't getting focus when dragging (#8063)
-				this.uiDialog.focus();
+			mousedown: function( event ) {
+				// Don't prevent click on close button (#8838)
+				// Focusing a dialog that is partially scrolled out of view
+				// causes the browser to scroll it into view, preventing the click event
+				if ( !$( event.target ).closest( ".ui-dialog-titlebar-close" ) ) {
+					// Dialog isn't getting focus when dragging (#8063)
+					this.uiDialog.focus();
+				}
 			}
 		});