Disable or add confirmation to SHIFT-Q shortcut to close the game

[drojf]

It was brought up that PONscripter will immediately close the game if you press SHIFT-Q, which could be easy to do accidentally.

It would be nice to add a confirmation dialog when you quit the game in this manner, or add an option in the game script so it can be disabled - probably a confirmation dialog is easier.

The code that implements this shortcut is here:

ponscripter-fork/src/PonscripterLabel_event.cpp

Lines 845 to 848 in 0e8080f

	if (shift_pressed_status && event->keysym.sym == SDLK_q &&
	current_mode == NORMAL_MODE) {
	endCommand("end");
	}