As an addendum: What I proposed is similar to the strategy currently implemented for MIME-types. There’s a generic "image" MIME-type icon that subsumes all sub-types of images until all those myriads of image types can be provides by special icons. I propose to add a generic "do action" icon that is a placeholder for the possible later "do $ACTION" icons.
-- GTK default icons used in several places https://launchpad.net/bugs/60424 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
