Re-enable cancel on exiting edit_link_save()

Fixes a flaw in `edit_link_save()` in insert.js:

On exit, `edit_link_save()` correctly ends the loading state of the cancel button (i.e. the element with id `edit-close-y...`), but leaves the element disabled. This gets evident if and only if the ajax call (`action=edit_save`) returns with a `status` of `fail`, since only then the edit row with the disabled cancel button will not be faded out.

js/insert.js

@@ -163,6 +163,7 @@ function edit_link_save(id) {
 			}
 			feedback(data.message, data.status);
 			end_loading("#edit-close-" + id);
+			end_disable("#edit-close-" + id);
 			end_disable("#actions-" + id + ' .button');
 		}
 	);