serialize tips and patterns

src/node_panel_brush.h

@@ -6,8 +6,9 @@
 #include "brush.h"
 #include "node_scroll.h"
 #include "node_text.h"
+#include "serializer.h"
 
-class NodeButtonBrush : public NodeButtonCustom
+class NodeButtonBrush : public NodeButtonCustom, public Serializer::Type
 {
 public:
     bool m_selected = false;
@@ -22,6 +23,8 @@ public:
     virtual void init() override;
     void set_icon(const char* path);
     virtual void draw() override;
+    virtual bool read(BinaryStreamReader& r) override;
+    virtual void write(BinaryStreamWriter& w) const override;
 };
 
 class NodePanelBrush : public Node