At the beginning of menu_editor_overview_form() it looked like we attach menu.css.
But in fact we never do, because $form variable is reset further below.

This was introduced in eb2368b8, the original D7 port.

Issue #2926344 by jstoller: Add _menu_editor_link_label_suffix(), to shof if an item is hidden or unpublished or for logged-in users only.

Issue #2949452 by tbpixel: Field changes are overwritten when changing the enabled state of a menu item

There was a patch by tbpixel in #2949452, but this solution is simpler.

Issue #2949163 by jtsnow: Menu Editor's link_title field does not allow for paths as long as Drupal core will allow

Background: Drupal core changed the link_title maximum length to 255 in #2578173.

Bug fix: _menu_editor_overview_tree_form() was called with undefined $form_data instead of $form_state.

This bug was introduced long ago in 55b13637.

Lanny Heidbreder authored Aug 17, 2016 and Andreas Hennings committed Aug 17, 2016

Solution is an added form_load_include().