xaw: Setup _NET_WM_ICON correctly

xaw: Setup _NET_WM_ICON correctly

Having upgraded to a new KDE version, I noticed the task switcher didn't
display timidity's thumbnail. Apparently it doesn't acknowledge the
WM_HINTS bitmap.

So the attached diff includes a trivial converter (1bit bitmap->ARGB) to set
up _NET_WM_ICON correctly. It uses the simple timidity.xbm icon (I also had a
version using the color icon from pixmap/timidity.xpm but I prefer this icon -
I could add that as an option).

The diff also includes some #include rationalization and resource renaming
("noPlaying" had a different spelling in .ad files vs the code).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>