Dar sprint 9

This contains work done by the Darwin team during last sprint. We've done the internal code review in 3 pull requests
- Fixed redirections on userpages on corporate pages + extension cleanup - https://github.com/Wikia/app/pull/924
- Admin dashboard disbaled on Special:UserLogin - https://github.com/Wikia/app/pull/917
- Fixing wall notifications bug and improving the code - https://github.com/Wikia/app/pull/926

Note that this should be merged together with config changes - https://github.com/Wikia/config/pull/147