Comment 1 for bug 56919

This will mostly likely be changed to your suggested behavior number one (in some way). Number 2 cannot really be implemented since drapes runs both as an applet and also as tray, and popping up a menu of the options for the applet is a job of the right button. And, in my opinion the behavior of that should stay consistent between the two.

Drapes, should also automatically import your gnome wallpapers that you already have. It works for some people and doesn't for others, and there is a bug filled for it. But showing a message when there are no wallpapers (non could be imported from the gnome settings) or there were all removed, is defiantly something we'd want.