The fixes include:
- improving the timer to make it more reliable
- making sure a read marker is added when changin rooms, this is needed when the messages have already been loaded.
- increase the default timer to 10s to avoid the read marker disappearing and being re-added when a message arrive in quick succession.
BUG: 465300
Currently trying to scroll with this scrollbar is probablematic and it's
unlikely we will find an easy solution to fix it, so make it non interactible.
Fix opening a room in a new window. This is done by makeing the model top level parameters in RoomPage set from RoomManager but overwritten by RoomWindow
Move the functionality to cache the contents of a chat bar from the room directly and to a new ChatCache object. This works pretty much the same with a few extra check and balances, this also made it easy to put a test suite around the functionality so I did. The current functionality should be identical to what exists.
This is in prep for threads which will require managing even more caches if we create one per thread.
