Draggable: Always clean up iframes. Fixes #8555 - Draggable: iframeFix option leaves iframes in DOM when using a selector.

(cherry picked from commit 19a9d57)

Author: jscheel

ui/jquery.ui.draggable.js

@@ -237,11 +237,10 @@ $.widget("ui.draggable", $.ui.mouse, {
 	},
 
 	_mouseUp: function(event) {
-		if (this.options.iframeFix === true) {
-			$("div.ui-draggable-iframeFix").each(function() { 
-				this.parentNode.removeChild(this); 
-			}); //Remove frame helpers
-		}
+		//Remove frame helpers
+		$("div.ui-draggable-iframeFix").each(function() { 
+			this.parentNode.removeChild(this); 
+		});
 
 		//If the ddmanager is used for droppables, inform the manager that dragging has stopped (see #5003)
 		if( $.ui.ddmanager ) $.ui.ddmanager.dragStop(this, event);