redid the filesel test. Added a way to set select multiple as a toggle

redid the filesel test. Added a way to set select multiple as a toggle

2002-02-16  Manish Singh  <yosh@gimp.org>

        * tests/testgtk.c: redid the filesel test. Added a way to set select
        multiple as a toggle button, and made show/hide fileops toggle
        buttons as well. get_selections() is called on OK and all the
        filenames selected are printed.