I believe I found an error in theme's CSS styles. In archaius.css file on line 452 there is a display:none property that hides the editing icons in the central column of the dashboard (with editing on).
I've replaced it with display:inline and icons returned. So far didn't see any unwanted effect.
I guest it have to be something I probably did because of the blocks in the central area, or probably it is something I changed for a private project an I push here.
I believe I found an error in theme's CSS styles. In archaius.css file on line 452 there is a display:none property that hides the editing icons in the central column of the dashboard (with editing on). I've replaced it with display:inline and icons returned. So far didn't see any unwanted effect.