Workaround for design library bug

https://code.google.com/p/android/issues/detail?id=175067

src/main/res/layout/task_list_activity.xml

@@ -4,6 +4,7 @@
 ** See the file "LICENSE" for the full license governing this code. 
 -->
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/taskListParent"
     android:background="?attr/asContentBackground"
     android:layout_width="fill_parent"
@@ -25,6 +26,7 @@
         android:layout_alignParentBottom="true"
         android:layout_marginBottom="16dp"
         android:layout_marginRight="16dp"
-        android:layout_marginEnd="16dp" />
+        android:layout_marginEnd="16dp"
+        app:borderWidth="0dp" />
 
 </RelativeLayout>