Remove as many chats as necessary to get under the limit.
Remove as many chats as necessary to get under the limit.

Before, if you scrolled up in an active meatspace, you could end up
with a large number of chats in your buffer. When a new chat came in,
only the top one would be removed, leaving you with an equilibrium
potentially much higher than the actual limit.

With this change, when a chat comes in and a user is scrolled to the
bottom, all of the chats above CHAT_LIMIT will be removed, instead of
just the top one.

sole/meatspace-chat