Adding transitions during folder creation

-> Seamless* transition from dropping item onto another
   to the creation of a folder containing those items
-> Seamless* transitions when adding the third item
   to a folder
-> Cleaned up the code in FolderIcon in order to achieve
   above

Change-Id: Iaf2519ac480acfdc928cc2b7585f28bc7d50bd23
diff --git a/res/values/config.xml b/res/values/config.xml
index 5b73769..d4c5ca4 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -63,8 +63,7 @@
 
     <!-- Parameters controlling the animation for when an item is dropped on the home screen,
          and it animates from its old position to the new one. -->
-
-    <integer name="config_dropAnimMaxDuration">400</integer>
+    <integer name="config_dropAnimMaxDuration">600</integer>
 
     <!-- The duration of the UserFolder opening and closing animation -->
     <integer name="config_folderAnimDuration">120</integer>