Changes
- Clipboard preview is disabled by default #266
- Introduce a new focus concept (focus tree instead of the focused object list) #350
- Multi-user focus indicators
- Save/restore last connected user viewport position and focus state
- Windows Console API focus event support
- Terminal: Dim text selection when terminal is not focused
- Fix standalone application focus tracking
- Tiling window manager: Popup menu for empty slots (popup menu when hovering mouse over top of empty slot)
- Stability improvement