safe mode #7
Description
The point of being in safe mode is to let an admin user get access to "pure" admin without theme and plugin overrides. Maybe have some granularity about it to define which things should not be active, at least in theme, plugins and mu-plugins levels.
Safe mode should apply to admins or other users that have "safe-mode" capability, and it is being activated loging in to login.php?safemode=1 (/login?safemode=1 should also work depends if parsing of /login still works)
Once a user had logged that way it will be in safe mode until he logs out or exists safe mode.