[INTERNAL] Register actions to SarosView by ID, not by class

This allows one class to provide more than one action, which is also
done by this patch by finally deleting the two permission change
actions.

Change-Id: Ie7e60bb1dec9191cd1213e698deeefce8d0981f5
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1548
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>
Reviewed-by: Damla Durmaz <ddurmaz88@gmail.com>
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>