Merge branch 'code-cleanup' into 'master'

Small code improvements

See merge request fdroid/fdroidclient!1300

app/src/main/java/org/fdroid/fdroid/views/AppDetailsActivity.java

@@ -217,6 +217,7 @@ public class AppDetailsActivity extends AppCompatActivity
         currentStatus = null;
     }
 
+    @Override
     protected void onStop() {
         super.onStop();
         visiblePackageName = null;

app/src/main/res/values/themes.xml

@@ -74,7 +74,7 @@
         <item name="screenshotPlaceholderIconColor">#e8e8e8</item>
 
         <!--Platform attributes-->
-        <item name="android:windowLightStatusBar" tools:targetApi="m">false</item>
+        <item name="android:windowLightStatusBar">false</item>
     </style>
 
     <!-- light app theme with accent colors following roughly android design guidelines -->