press 'q' in plot window does not close window on windows terminal

[Tatsuro M. <tma...@ya...>]

I have noticed that press 'q' in plot window does not close window on windows terminal.
For wxt, qt, caca, and x11, pressing 'q' causes the close of the plot window.

The pressing 'q' behavior on windows terminal is not mentioned in the section
of windows terminal in the gnuplot manual.
Therefore this is not a bug.

But the behavior is hopefully unified.

I do not know other platform dependent interactive terminal like aqua or pm.

Regards

Tatsuro