…ns the About dialog twice (the cache was returning the cached menuCmdID value, rather than running that action); TODO = verify it works with MIME Tools > URL Decode, and create a better test suite

…ite up a test that will verify one or more commands, predicated on the existence of the appropriate submenus.

==
This is a mixed file
https://example/%20%61%62%63
here is "%3d"
https://example/%20%61%62%63

print "\n" x 80;
for(1..2) {
    editor->selectAll();
    notepad->runPluginCommand('MIME Tools', 'URL Decode');
    #print STDERR editor->getText();
    sleep(5);
    editor->undo();
    #print STDERR editor->getText();
    sleep(5);
}
editor->clearSelections();
==

…e test suite; will be doing a skip-based logic for the plugins

…y doing 2x each, it verifies cache; by verifying Converter>About, it verifies array argument; to avoid false-failure if someone has deleted/not-installed Converter plugin (which ships by default), it sets those tests as TODO; manually checked that -noPlugin still gives the Plugins menu; if for some reason it cannot find a plugins menu, it will skip the remaining tests. With all that together, strange configurations shouldn't give false-fail, but on reasonable systems, it will properly check; need to commit for more systems to verify with