Application expander doesn’t helps with xoblite’s issue (left-cliking on an app on deskbar) when using Deskbar as a top or bottom bar (no expando there).
And it even shows the “windows handling” menu (“ / Hide all / Close all”) when the app has only one window open.
One could reasonably expect it to just bring forward (or minimize) said window in that case.
(adding it to my “wish-I-knew-how-ToDo” list 
)