quitButtonF :: F Click b
quitButtonF is a quit button, i.e., a command button that, when pressed,
terminates the program.
Keyboard shortcut: <Mod1>q
Layout: quitButtonF places itself as far down and to the right as
possible, if there is spare room.
quitButtonF
The window manager usually provides a quit button in the window frame,
or something equivalent, so there usually is no need to put an
extra quit button in the program. (This was not always the case, though.
You can still find quit buttons in some of the old programs distributed
with X Windows, e.g. xfd, xfontsel and xmore.)
