Update bootstrap rails gem.
Disable a few zeus commands.
Unify header with other CyT projects.
Use heigher boxes for overview parts.
Revert "Update bootstrap rails gem."

This reverts commit 11fae0a93db20381073a2488c5bb09527fc8684c.
Merge remote-tracking branch 'origin/staging'

rts commit 11fae0a93db20381073a2488c5bb09527fc8684c.
Use lyb_devise_admin.
Split settings class and user menu.
Drop locale from user settings.
Whitespace cleaning in screen.scss.
Add missing migration to remove locale from users.
Fix booking with booking templates.