display a vertical scrollbar

Author: tibbi

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

@@ -17,6 +17,7 @@
             android:layout_height="wrap_content"
             android:clipToPadding="false"
             android:paddingLeft="@dimen/activity_margin"
+            android:scrollbars="vertical"
             app:layoutManager="android.support.v7.widget.LinearLayoutManager"/>
 
     </android.support.v4.widget.SwipeRefreshLayout>