RoomDrawer Cleanup

This started off as me just wanting to adjust the margin of the search bar but grew a touch ...

- Cleanup margins especially make the member search bar have the same padding as everything else
- Move room information title to header and align all buttons right.
- Make the room name actually bold
- Remove highlight from the user list item after the menu is closed
- Always use actual width so that the drawer isn't wider when modal
- Use control instead of pane for the search bar as the padding works more consistently
- Use BasicListItem instead of AbstractListItem for the member list as this has the layout predefined

![image](/uploads/ab2c4066479b0510bcb2fe6ae91f7bc3/image.png)