moves the specified item to a new position
| sid | string | the ID of the item to move | 
| tindex | number | a new position of the item (a new index) | 
| tobj | object | the object that the item is moved to | 
| details | object | extra parameters for moving | 
| string | the item ID | 
// moving in the same list
$$("list").move("a12", 0);
$$("list").move("a13", -1);
 
// moves an item to a different list
var id = $$("list").move("a13", 0, $$("list2"));