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.
Create a new module for the room info drawer QML. This also requires moving some QML to LibNeoChat common with other modules. Finally all QML in roominfo is modifed to not depend on app.
This is only called after we already get an event with lastEvent() so
doing it again is useless. Instead, we should refactor it to behave like
similar functions (e.g. isEventHighlighted.)
I'm 99% sure of the recent crashes we've been seeing are double-frees,
the QCache one me and Duha encountered must be one. The QCache is in
charge of the one in ContentProvider, so it will sometimes try to delete
or access something already destroyed by the QML engine.
While I'm at it, I also made sure to check every other Q_INVOKABLE to
ensure we don't hit this elsewhere.
CCBUG: 502747
