Finish app modernization

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

@@ -1,19 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <item
         android:id="@+id/status"
         android:title="@string/menu_status"
-        android:showAsAction="always" />
+        app:showAsAction="always" />
 
     <item
         android:id="@+id/shortcuts"
         android:title="@string/menu_shortcuts"
-        android:showAsAction="never" />
+        app:showAsAction="never" />
 
     <item
         android:id="@+id/about"
         android:title="@string/menu_about"
-        android:showAsAction="never" />
+        app:showAsAction="never" />
 
 </menu>