Drag now show the icon while you're dragging, so now need to work out all of the edge cases for each action.

gui/dnd_loot.hpp

@@ -18,6 +18,7 @@ namespace gui {
   class DNDLoot : public DeadSimpleFSM<DNDState, Event> {
     public:
       std::optional<guecs::Entity> $grab_source = std::nullopt;
+      std::shared_ptr<sf::Sprite> $grab_sprite = nullptr;
       StatusUI& $status_ui;
       LootUI& $loot_ui;
       sf::RenderWindow& $window;
@@ -37,6 +38,7 @@ namespace gui {
       void ITEM_PICKUP(Event ev, std::any data);
       void handle_mouse(Event ev, guecs::UI& gui);
       void mouse_action(bool hover);
+      void render();
       sf::Vector2f mouse_position();
   };
 }