Update `ChatDocumentHandler` so `RoomManger` is no longer required for saving the text in the chatbar between room switches. This is achieved by allowing `ChatDocumentHandler` to get the correct `ChatBarChache` itself rather than having to have it passed from `ChatBar.qml`. This avoids any race conditions.
Refactor TimelineView to make it more reliable and prepare for read marker choice. This is done by creating signalling from the mode when reset which can be used to move the scrollbar to the newest meassage.
Some of the spaghetti is also removed so there is no need for ChatBar and TimelineView to talk directly.
The code to mark messages as read if they are all visible after 10s has been removed infour of just marking as read on entry if all are visible. This is temporary until a follow up providing user options is finished (although it will be one of the options)
We forgot to connect to onTapped on the touchscreen-specific TapHandler.
I also needed to carve out a specific case for DMs so it doesn't try to
resolve the non-existent "DM" resource.
I'm pretty unhappy with the current state, almost no other chat
application (including other Matrix clients) work like this. The biggest
annoyance is opening *other* spaces will send you to the Space Home -
which is almost never what you want! Even though our Space Home is
awesome :-)
Now when you switch spaces, the last room in that space is stored and
will be restored. This also allows us simplify some of the
"open the last room" code. I made sure that this works for the two
special spaces "Home" and "Friends" so everyone can take advantage of
this better UX.
Since this is constantly-changing-state and the worst that can happen is
the wrong room opening on launch, I didn't bother migrating the existing
setting. We'll have to kill it eventually anyway when we make it
account-specific!
Use the forget function to leave a room everywhere this is both for consistency and to reduce dependencies. This way no dependency on RoomManager is required to leave a room and since in all cases they have an object they can just call the function.
