Tapping on mini-screen in All Apps view now goes back to home screen

- had to disable touch event swallowing in workspace in X-Large mode to get this to work
- also changed default screen in XLarge mode to 2 (the middle one)
diff --git a/res/layout-xlarge/launcher.xml b/res/layout-xlarge/launcher.xml
index 3f56b45..f0564ca 100644
--- a/res/layout-xlarge/launcher.xml
+++ b/res/layout-xlarge/launcher.xml
@@ -34,6 +34,7 @@
         android:id="@+id/workspace"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        launcher:defaultScreen="2"
         launcher:canonicalDeviceWidth="8"
         launcher:canonicalDeviceHeight="4">