no longer asks the user to choose a drive when init
add more space above "Recent Updated"
[win] fixed a problem when restored from minimized state
updated i18n
fixed margin between avatar and account info on mac
update version to 3.1.1
improve styles for mac
show unread messages tray icon on mac
improve download repos dialog size on mac
added @2x icons
[mac] remove linkage to Carbon
remove debug output
added more 2x icons