For the history, this page was present in 1.6 and allowed to add, edit, delete, activate / deactivate menus and reorganize them thanks to the position column.
This page was removed in 1.7.0 because users were deleting menu entries but did not know how to re-add them with the controller name.
The behavior in 1.7.X is:
No “menu” tab in the BO menu (as in 1.7.x)
An “access denied” message when trying to access directly to the URL controller=AdminTabs (as in 1.7.x)
In 1.7.8 a message will be added in the code to indicate to the developers how to access to this page if they want to:
“You reached a page that is not accessible in the 1.7.x version anymore, except if you know the
AdminTabs controller. A decision has been made to remove it from the software because it was causing critical issues to many users as it requires a few technical skills. Only the back office access is blocked, the file remains present for the developers who would like to use it as they used to.”