TinyMCE: prevent removing of the temp link element when opening the advanced link dialog to insert new link.

Part props figureone for finding the cause.
Fixes #40558.

git-svn-id: https://develop.svn.wordpress.org/trunk@40644 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/js/tinymce/plugins/wplink/plugin.js

@@ -587,9 +587,9 @@
 						editor.focus(); // Needed for IE
 					}
 
+					editToolbar.tempHide = true;
 					window.wpLink.open( editor.id, url, text, linkNode );
 
-					editToolbar.tempHide = true;
 					inputInstance.reset();
 				}
 			}