Fixing various small bugs with launcher

- Items added from customization tray add from top left now
- Fixing issue where wallpaper tab was not showing
- Workaround for the extra pixel line showing in homescreen drag icons
- Speeding up animations for tab transitions and clicking

Change-Id: I865531bb4cf896320a9e2ff6cef08bed221a2294

src/com/android/launcher2/CustomizePagedView.java

@@ -289,6 +289,7 @@ public class CustomizePagedView extends PagedView
     public void setCustomizationFilter(CustomizationType filterType) {
         mCustomizationType = filterType;
         setCurrentPage(0);
+        updateCurrentPageScroll();
         invalidatePageData();
 
         // End the current choice mode so that we don't carry selections across tabs