A rename that is waiting for another action to finish cannot be cancelled (from the UI)

When a page is renamed / moved, there is a lock system that locks the page tree that is being impacted by the rename action.

If another refactoring action (rename) is launched on the locked tree, a message will be displayed on the screen of this second action that the rename cannot start until that other job is finished.

As it's not clear when the action will be executed, an option to cancel the blocked action should be available, to allow the user that has ordered the refactoring to cancel the refactoring and do it later / do it differently / control what's happening on the wiki.