Make unread badge configurable

src/common/settings.js

@@ -30,7 +30,8 @@ var loadDefault = function(version) {
         version: 1,
         notifications: {
           flashWindow: 0 // 0 = flash never, 1 = only when idle (after 10 seconds), 2 = always
-        }
+        },
+        showUnreadBadge: true
       };
   }
 }