calculate scroller padding

Change-Id: I727c425e096220ae1230e3fbe0f1edb4b3fea8ed
diff --git a/res/layout/nav_tab_view.xml b/res/layout/nav_tab_view.xml
index 7d9263d..5a71c71 100644
--- a/res/layout/nav_tab_view.xml
+++ b/res/layout/nav_tab_view.xml
@@ -79,7 +79,7 @@
             android:src="@drawable/ic_stop_holo_dark"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="right|bottom"
+            android:layout_gravity="bottom|right"
             android:background="@drawable/navtab_close_background" />
     </FrameLayout>
 </LinearLayout>