Add support session elevation for Linux hosted Java Web Start sessions

If you host from a Windows device, the status menu has the option to elevate a session, but from using it and from looking at the feature list this button only exists on Windows despite the feature only needing to be supported on the guest device since it's purely a window that's opened on the guest machine.

https://docs.connectwise.com/ScreenConnect_Documentation/Get_started/Host_client/Status_menu

From continuing to test and trawling the forums here, sending Ctrl+Alt+Delete works to elevate, so I'm at least functional now, but the lack of a button for it threw me for a loop.