While playing around with keynav in the FC3 panels, I noticed some shortcomings:

1. I can't keynav to the notification area, with the consequence that there is no
way to get at its context menu without the mouse

2. The menu applet is not in the focus chain, which feels unnatural, although
there is a workaround (Alt-F1)

3. keynaving to the window list focuses the window buttons, and pressing the
"menu" key brings up the applets context menu, not the window-list context menu,
so there is no way to e.g minimize a window from there window list via keynav.
The workaround is to keynav to the wm menu in the window frame.

I think it would be nicer to 

a) include the menu applet in the focus chain
b) include the handles of the window list and the notification area 
  in the focus chain
c) bring up the applets context menu when the "menu" key is pressed on a handle,
but bring up the window-list context menu if the "menu" key is pressed on a
window button