Extend DPAD support.

Allows the hardware DPAD to control more of the UI.

Closes #4989
// FREEBIE

res/layout/conversation_item_sent.xml

@@ -7,6 +7,9 @@
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal"
+        android:focusable="true"
+        android:nextFocusLeft="@id/container"
+        android:nextFocusRight="@id/embedded_text_editor"
         android:background="@drawable/conversation_item_background">
 
     <RelativeLayout android:layout_width="match_parent"