Enable Timeless everywhere

It has been tested in a few places, and there are requests at many
more. Given that it only enables an option in preferences, and is
not enabled by default unless the user selects the option, I think
it makes more sense to enable it everywhere, than to keep enabling
on an ever-expanding list of wikis.

Bug: T154371
Change-Id: I887eb8e30061e2e8fac448c7512ee420142b6213