F10 open main menu
nit: remove debug code
fix ActionManager to pass test
fix an issue with polymer and dart2js treeshaking
Merge pull request #1040 from ussuri/fix-stuck-menu-selection

Fix sticky menu selection
review fixes
merge to master
Merge pull request #1054 from devoncarew/devoncarew_fix_menu_polymer

fix an issue with polymer and dart2js treeshaking
feedback
Merge pull request #1047 from sunglim/hotkey

F10 set focus to main menu.