Reproduction steps
- Open a server with a forum channel with posts, and threads.
- Type "in:" in the search bar. No forum channel, forum post, or thread will be suggested.
- Type "in: [forum channel name, forum post name, or thread name]". It will not search within either of those.
Expected behaviour
The search should work for and suggest forum channels, forum posts, and threads, as it does for other channel types.
Actual behaviour
The search does not work for nor suggest forum channels, forum posts, or threads.