Make users theme configurable
Created by: karlhungus
GITLAB-1262
Change-Id: I690cb8ea294df53ebe8405a519c23c501af2c21a
Conflicts: app/models/user.rb config/initializers/1_settings.rb spec/models/user_spec.rb
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: karlhungus
GITLAB-1262
Change-Id: I690cb8ea294df53ebe8405a519c23c501af2c21a
Conflicts: app/models/user.rb config/initializers/1_settings.rb spec/models/user_spec.rb