Kill the hung graphics window without rebooting

[prithvirajkadiyala]

Countdown timer with large graphics digits now works, but when Charles incorporated it back into the 2017 table program the graphics window hangs where the program is doing more action ... appears that something like buffer space is still too limited to accommodate both the graphics window and whatever is buffered on the UI display. Basically, Charles still has the problem where a reboot was needed to kill a hung graphics window (i.e., the desktop couldn't kill it and it did not show up under Linux ps).

[prithvirajkadiyala]

You can find the test version of the code in the next release probably on Friday the 13th September(v24.9)