improve termination sequence on windows, use patterns instead of textures as directory name

src/app.h

@@ -60,12 +60,10 @@ public:
     NodePopupMenu* menu_edit = nullptr;
     NodePopupMenu* menu_layers = nullptr;
     NodeBorder* sidebar = nullptr;
-    std::shared_ptr<NodePanelBrush> brushes;
     std::shared_ptr<NodePanelLayer> layers;
     std::shared_ptr<NodePanelColor> color;
     std::shared_ptr<NodePanelStroke> stroke;
     std::shared_ptr<NodePanelGrid> grid;
-    std::shared_ptr<NodePanelBrushPreset> presets;
     NodeCanvas* canvas;
     Node* current_panel = nullptr;
     NodeScroll* panels;