win:delete-frame-with-window : added

#'win:delete-window :
   if win:delete-frame-with-window is nil:
         1) do not delete the frame of the window
            2) do not call #'win:set-wc

these changes have been tested, and appear to work well enough.

(xemacs 21.5.4, with gtk widgets, might make some strange widgets appear
in the buffer that is selected after the key-sequence C-c C-w 9 c )