Fixed FAB margin issue.

Fixed floating action button margins so it is
centered on screen.

Change-Id: I8b67dbe96776e4313872ffcc11cc21868674d148
diff --git a/res/layout/dialtacts_activity.xml b/res/layout/dialtacts_activity.xml
index 5727d8a..aa4ce94 100644
--- a/res/layout/dialtacts_activity.xml
+++ b/res/layout/dialtacts_activity.xml
@@ -41,7 +41,6 @@
         android:id="@+id/floating_action_button_container"
         android:layout_width="@dimen/floating_action_button_width"
         android:layout_height="@dimen/floating_action_button_height"
-        android:layout_marginRight="@dimen/floating_action_button_margin_right"
         android:layout_marginBottom="@dimen/floating_action_button_margin_bottom"
         android:layout_gravity="center_horizontal|bottom" >