improve layout

src/node_panel_layer.h

@@ -5,6 +5,7 @@
 #include "node_slider.h"
 #include "node_button_custom.h"
 #include "node_combobox.h"
+#include "node_scroll.h"
 
 class NodeLayer : public NodeBorder
 {
@@ -52,7 +53,7 @@ public:
     std::function<void(Node* target, int old_idx, int new_idx)> on_layer_order;
     NodeLayer* m_current_layer = nullptr;
     std::vector<NodeLayer*> m_layers;
-    NodeBorder* m_layers_container;
+    NodeScroll* m_layers_container;
     NodeSliderH* m_opacity;
     NodeCheckBox* m_alpha_lock;
     NodeComboBox* m_blend_mode;