Fix settings theme

app/src/main/res/layout-sw720dp/activity_settings.xml

@@ -29,12 +29,12 @@
 
     <android.support.v7.widget.CardView
       android:layout_width="@dimen/max_content_width"
-      android:layout_height="wrap_content"
+      android:layout_height="match_parent"
       android:layout_gravity="center_horizontal"
       android:layout_marginBottom="32dp"
       android:layout_marginTop="-64dp"
-      android:background="?attr/colorBackgroundCard"
       android:clipToPadding="false"
+      app:cardBackgroundColor="?attr/colorBackground"
       app:cardElevation="4dp">
 
       <FrameLayout