Centralize retained dialog cancel bindings

src/node_dialog_layer_rename.cpp

@@ -2,6 +2,7 @@
 #include "log.h"
 #include "node_dialog_layer_rename.h"
 #include "canvas.h"
+#include "legacy_ui_overlay_services.h"
 #include "node_image_texture.h"
 
 Node* NodeDialogLayerRename::clone_instantiate() const
@@ -26,9 +27,7 @@ void NodeDialogLayerRename::init_controls()
     btn_ok = find<NodeButton>("btn-ok");
     btn_cancel = find<NodeButton>("btn-cancel");
     input = find<NodeTextInput>("txt-input");
-    btn_cancel->on_click = [this](Node*) {
-        destroy();
-    };
+    pp::panopainter::bind_legacy_click_destroys_node(*btn_cancel, *this);
 }
 
 void NodeDialogLayerRename::loaded()