Fixed broken tests
Content type media/categories/comments enable and disable methods with tests
Enable and disable media, comments and categories in content types.
Show and hide editor sections based on content type settings.
Inject content type service and discuss service into content service
Media, comments and categories checker for an item
Minor updates.
Content item comments topic and accessors.
Integration tests for posting comments to content item and deleting by relation.
Reply to messages in content item topic.
Minor updates
Allow disabling comments on single content item
Fixed some broken unit tests
Integration tests for getting item comments.
Enable/disable comments on per item basis
Exceptions forbidding categories
Remove media album from content item
Exceptions forbidding media.
Exceptions forbidding comments
Basic configuration for content commenting