📣 Introducing default chat channels (automatically add users)

[mcwumbly (Dave McClure)]

OK, here’s what I’m seeing for a user “Bob” who only has “See” access to the category for the channel:

1. I do see Bob in the members list (unexpected)
2. Bob does not see the channel in the sidebar initially (ok)
3. Bob does not see the channel in /chat/channels/browse (ok)
4. Bob does see the channel if he visits /chat/c/${channelname}/${id} (unexpected)
5. Bob does see notifications when someone mentions him in the channel (unexpected)
6. Bob does see the channel in his sidebar once he gets a mention or posts in the channel after visitng it directly (unexpected)

Will add this to our list to fix up.