Discussions

Added:
- Reason category selector in the moderate posts modal. The selected category is sent with the moderation of the selected posts or all posts of a discussion
- Reason category in the moderation info tooltip of moderated posts, including posts moderated by AI
- Posts can be moderated with only a reason category selected. In that case the category label is used as the moderation reason

Added:
- Mark as read/unread for posts in the Discussions tab, for a single post or for the selected posts. The read state is saved in the browser per staff member
- Posts limit filter for the posts of a discussion in the Discussions tab
- Refresh button for the posts of a discussion in the Discussions tab. Posts created after the discussion was opened are marked as new

Fixed:
- Posts of a discussion not being displayed when going back to an already visited page
- Pinned posts of a discussion disappearing when navigating to the next page
- Posts of a discussion not being displayed when changing the posts filters or collapsing and expanding the discussion while not on the first page
- Replies not being displayed for posts on already visited pages in the Discussions and Posts tabs
- Replies of pinned posts not being displayed when not on the page the pinned posts were loaded from