New API messages were added to distinguish between a user leaving of
their own volition and being kicked/banned.
Messages are now shown in the chat view when a user leaves or or
kicked/banned, etc.
The conversation view now displays the protocol icon and room subject.
Messages for receiving room names (IM_ROOM_NAME) and subjects
(IM_ROOM_SUBJECT) were added, and support for the latter was given to
the XMPP add-on.
New message APIs were added, and several (room-related) im_what values were
moved into the 150s/160s.
UserItem::_TintColor() was moved to CayaUtils, because it can be used in
several different contexts.
The new Notifier→Observer relation chain:
* Conversation → ConversationItem, ConversationView
* User → UserListItem, UserInfoWindow, UserPopUp
* Contact → RosterItem
These line up pretty intuitively― if something changes in the conversation, you
want the list item and view to change too.
But there's one more here that's less intuitive:
* User → Conversation
If Conversation observes something from a user (i.e., status change), it
immediately knows to do one thing only: invalidate the user list, because
something's changed.
UserListView and UserItem were added as the backbone of the user-list,
and the (currently unused) Caya message CAYA_SEND_INVITE was established
for inviting users to rooms.
Some menus were reworked (e.g., pop-ups of the RosterListView) or
generally tweaked to be more sensical or consistent.
Now all instances of sending messages (bar status changes) to a
conversation's CayaRenderView only happen when attached to the window.
Messages sent by user appear after the protocol confirms it's been sent
(IM_MESSAGE_SENT), rather than appearing right after the user sends it
to the protocol (IM_SEND_MESSAGE).
Logs are now re-enabled (since they can safely be appended under any
circumstance).
All chats now stay in a single window, which removes and switches its
current ConversationView with the appropriate one using
Conversation::GetView().
This is a stepping-stone to merging the ChatWindow into the MainWindow.