_wayland drag wip

Source/Engine/Platform/SDL/SDLInput.cpp

@@ -496,6 +496,14 @@ bool SDLInput::HandleEvent(SDLWindow* window, SDL_Event& event)
         }
         return true;
     }
+    case SDL_EVENT_DROP_POSITION:
+    {
+        // We are not receiving mouse motion events during drag-and-drop
+        auto dpiScale = window->GetDpiScale();
+        const Float2 mousePos = window->ClientToScreen({ event.drop.x * dpiScale, event.drop.y * dpiScale});
+        Input::Mouse->OnMouseMove(mousePos, window);
+        return true;
+    }
     case SDL_EVENT_WINDOW_MOUSE_LEAVE:
     {
         Input::Mouse->OnMouseLeave(window);