Menu hotkeys fix.

The observable bug was: on Liinux, when popup menu is opened (F9->Commands), left arrow key does not open popup menu that is on the left from the "Commands" menu.
Merge pull request #87 from helgp/master-0.16.2

Menu hotkeys fix.
Merge pull request #88 from corporateshark/master-0.16.2

Master 0.16.2