Completely change the behavior of entering special keys (like Ctrl+Alt+Del).

Do not show a modal dialog which needs to be closed after every key sequence; instead replace it with a toggle action which can be enabled to fetch every possible key (all except some X server shortcuts like Ctrl+F1) while the remote desktop has the focus.

This should improve the the workflow quite a lot.

Please note that KWin shortcuts like Alt+Tab are not active while this mode is active and the remote desktop has the focus.