Use push/pop mechanism for cursors

modules/game_interface/gameinterface.lua

@@ -296,7 +296,7 @@ function onMouseGrabberRelease(self, mousePosition, mouseButton)
   end
 
   selectedThing = nil
-  g_mouse.restoreCursor()
+  g_mouse.popCursor('target')
   self:ungrabMouse()
   return true
 end
@@ -331,14 +331,14 @@ function startUseWith(thing)
   selectedType = 'use'
   selectedThing = thing
   mouseGrabberWidget:grabMouse()
-  g_mouse.setCursor('target')
+  g_mouse.pushCursor('target')
 end
 
 function startTradeWith(thing)
   selectedType = 'trade'
   selectedThing = thing
   mouseGrabberWidget:grabMouse()
-  g_mouse.setCursor('target')
+  g_mouse.pushCursor('target')
 end
 
 function createThingMenu(menuPosition, lookThing, useThing, creatureThing)

modules/game_interface/widgets/uigamemap.lua

@@ -17,7 +17,7 @@ function UIGameMap:onDragEnter(mousePos)
 
   self.currentDragThing = thing
 
-  g_mouse.setCursor('target')
+  g_mouse.pushCursor('target')
   self.allowNextRelease = false
   return true
 end
@@ -25,7 +25,7 @@ end
 function UIGameMap:onDragLeave(droppedWidget, mousePos)
   self.currentDragThing = nil
   self.hoveredWho = nil
-  g_mouse.restoreCursor()
+  g_mouse.popCursor('target')
   return true
 end
 

modules/game_interface/widgets/uiitem.lua

@@ -6,14 +6,14 @@ function UIItem:onDragEnter(mousePos)
 
   self:setBorderWidth(1)
   self.currentDragThing = item
-  g_mouse.setCursor('target')
+  g_mouse.pushCursor('target')
   return true
 end
 
 function UIItem:onDragLeave(droppedWidget, mousePos)
   if self:isVirtual() then return false end
   self.currentDragThing = nil
-  g_mouse.restoreCursor()
+  g_mouse.popCursor('target')
   self:setBorderWidth(0)
   self.hoveredWho = nil
   return true