Merge changes from topic 'am-aba0a928-a4ff-4569-8ae5-9694c6816755' into ub-launcher3-master

* changes:
  Polish Folder open animation during drag and drop. am: ecf451457b am: 3c255ca1ab
  Polish Folder open animation during drag and drop. am: ecf451457b
  Polish Folder open animation during drag and drop.