Implement application shortcuts (fix #161)

app/src/main/res/menu/main.xml

@@ -6,9 +6,14 @@
         android:title="@string/menu_status"
         android:showAsAction="always" />
 
+    <item
+        android:id="@+id/shortcuts"
+        android:title="@string/menu_shortcuts"
+        android:showAsAction="never" />
+
     <item
         android:id="@+id/about"
         android:title="@string/menu_about"
-        android:showAsAction="ifRoom" />
+        android:showAsAction="never" />
 
 </menu>