hide the Settings menu at scroll

Author: tibbi

app/src/main/res/layout/activity_settings.xml

@@ -16,6 +16,7 @@
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="@color/color_primary"
+            app:layout_scrollFlags="scroll|enterAlways"
             app:title="@string/settings"
             app:titleTextAppearance="@style/AppTheme.ActionBar.TitleTextStyle" />