On r31113 which enables HIDDENCAT feature, all category on the buttom of each page are now linked in red. After clicking on theses one, we access on editing mode.
See, by example, the link below :
http://grondin.tuxfamily.org/index.php?title=Accueil
Version: 1.12.x
Severity: normal
URL: http://grondin.tuxfamily.org/index.php?title=Accueil