Merge branch 'master' into feature/stabilization
FORUM-618 | Cannot uncheck some forums while checking other forums in the same category
FORUM-722 | Cannot hidden categories/forums scoping.
FORUM-696 FORUM-704 FORUM-720 | Missing implements Serializable for Object cache key used for ExoCache
Merge branch 'feature/stabilization'
Merge branch 'master' into feature/stabilization
Update pom version after merging feature/stabilization to master
Merge branch 'master' into feature/social-notifications