screen space pattern failed, needs screen space uv coordinate on CompDraw shader

src/node_panel_stroke.cpp

@@ -250,6 +250,7 @@ void NodePanelStroke::init_controls()
         };
 
         m_brush_popup->on_brush_changed = [this](Node*, int index) {
+            m_dual_enabled->set_value(true, true);
             if (on_dual_changed)
                 on_dual_changed(this, m_brush_popup->get_texture_path(index), m_brush_popup->get_thumb_path(index));
             m_dual_brush_thumb->set_image(m_brush_popup->get_thumb_path(index));