Cleaning up some spring-loaded related dragging code.  Allow cancel spring loaded mode.

Change-Id: Ie1f0468c563bed7abc1aa6416e222cdb0853c03a
diff --git a/res/layout/apps_customize_pane.xml b/res/layout/apps_customize_pane.xml
index ecb10ec..a94b6e6 100644
--- a/res/layout/apps_customize_pane.xml
+++ b/res/layout/apps_customize_pane.xml
@@ -80,6 +80,8 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_gravity="bottom"
+                android:visibility="gone"
+                android:alpha="0"
                 android:scaleType="fitXY"
                 android:src="@drawable/hotseat_track_holo" />
             <ImageView