Fix duplicated key warning
Fix duplicated key warning

- Combines class params
- Fixes:
>/vagrant/mushroom-observer/app/views/account/blocked_ips.html.erb:16: warning: key :class is duplicated and overwritten on line 16

MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer