fix navscreen orientation

    handle configuration change in navscreen
    capture actual screen for tabs
    size tabs correctly

Change-Id: I20ff72bdcab13678cdba4c55849bd5ff16cb6568
diff --git a/res/layout/custom_screen.xml b/res/layout/custom_screen.xml
index 525f30c..2105501 100644
--- a/res/layout/custom_screen.xml
+++ b/res/layout/custom_screen.xml
@@ -37,3 +37,4 @@
         />
     </LinearLayout>
 </FrameLayout>
+