improve containers

modules/core_widgets/core_widgets.otmod

@@ -14,5 +14,7 @@ Module
     require 'uitabbar'
     require 'uipopupmenu'
     require 'uiwindow'
+    require 'uiitem'
     require 'tooltip/tooltip'
-    require 'messagebox/messagebox'
+    require 'messagebox/messagebox'
+    

modules/core_widgets/uiitem.lua

@@ -0,0 +1,6 @@
+function UIItem:onMouseRelease(mousePosition, mouseButton)
+  local item = self:getItem()
+  if not item or not self:containsPoint(mousePosition) then return false end
+  return Game.processMouseAction(mousePosition, mouseButton, nil, item, item, nil, item)
+end
+