* Key to jump to latest/oldest unread #186
Latest/oldest unread/highlight.
Default bindings match the bindings for previous/next unread/highlight.
Allows the user to read messages in the order of receiving them.
Or the opposite order, to stay on top of things.
* Clean up code
Use let instead of var, and proper indentation
* Fix case for some variables in RoomList.qml
Some variables were using snake_case instead of camelCase like usually
done in QML code (note that the model items come from python)
Co-authored-by: miruka <miruka@disroot.org>