====== Rotation Graber ======
 
There are 3 schemes for grabber:

  - Grab too Preview - grabber takes X random thumbs from gallery and adds them to Preload , later you can select thumbs there and add them to DB (Pull)
  - Take 1 random - takes 1 random thumb and adds it to active thumbs.
  - Take all thumbs - takes all thumbs and adds to DB