implement cursor change for win32

modules/core_widgets/uiitem.lua

@@ -1,7 +1,7 @@
 function UIItem:onDragEnter(mousePos)
   local item = self:getItem()
   if not item then return false end
-  
+
   self.currentDragThing = item
   setTargetCursor()
   return true
@@ -15,10 +15,10 @@ end
 
 function UIItem:onDrop(widget, mousePos)
   if not widget or not widget.currentDragThing then return false end
-  
+
   local pos = self.position
   local count = 1 -- todo make a window for it
-  
+
   Game.move(widget.currentDragThing, pos, count)
   return true
 end