fix mixer rect, textures popup, parallel abr import

src/node_panel_brush.h

@@ -47,6 +47,7 @@ class NodePanelBrush : public Node
         bool m_user_brush = false;
     };
 public:
+    std::string m_dir_name;
     std::function<void(Node* target, int index)> on_brush_changed;
     std::function<void(Node* target)> on_popup_close;
     virtual Node* clone_instantiate() const override;