Make the deletion error undraggable. It's not necessary and risks triggering the bug where a dialog jumps to the top of the page after reopening.

Also, remove the explicit button blur. Only one button can be focused at any given time, so focusing on a new button will automatically remove focus from the previous focused button.

git-svn-id: https://plugins.svn.wordpress.org/admin-menu-editor/trunk@943340 b8457f37-d9ea-0310-8a92-e5e31aec5664