improve brush jitter

src/node_panel_stroke.cpp

@@ -151,8 +151,8 @@ void NodePanelStroke::init_controls()
             if (on_brush_changed)
                 on_brush_changed(this, m_brush_popup->get_texture_path(index), m_brush_popup->get_thumb_path(index));
             m_brush_thumb->set_image(m_brush_popup->get_thumb_path(index));
-            m_brush_popup->mouse_release();
-            m_brush_popup->parent->remove_child(m_brush_popup.get());
+            //m_brush_popup->mouse_release();
+            //m_brush_popup->parent->remove_child(m_brush_popup.get());
         };
     };
 
@@ -209,6 +209,7 @@ void NodePanelStroke::init_controls()
         });
     };
 
+    update_controls();
 }
 
 void NodePanelStroke::init_slider(NodeSliderH*& target, const char* id, float Brush::* prop)