* Settings: Add setting for hiding version number for anonymous users

Fixes #12925

* Hide version string from footer when unavailable

* Settings: Test frontend settings with hide version for anonymous users

* Settings: Add hide version variable to frontend settings

* Make AnonymousHideVersion non-global

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* Settings: Improve test neighbor friendliness, reset state before and after

* Settings: Use T.Cleanup

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>