Fixing folder icon not getting redrawn when the contents change

> Removing parent from ItemOperator as inconsistant values were
being passed in workspace and folderPagedView
> Fixing itemChanged causing multiple redraws, by passing a
'animate' parameter to explicitely request animation

Bug:27740161
Bug:28015426

Change-Id: Ide7b266bde9aad5f450a3f808a59182fe01a5110