Centralize retained delete confirmation closing

src/legacy_ui_overlay_services.h

@@ -80,7 +80,7 @@ template <class ButtonT>
 void bind_legacy_click_destroys_node(ButtonT& button, Node& target) noexcept
 {
     button.on_click = [&target](Node*) {
-        target.destroy();
+        close_legacy_dialog_node(target);
     };
 }
 

src/node_dialog_browse.cpp

@@ -59,7 +59,7 @@ void NodeDialogBrowse::init_controls()
                 selected_name = "";
             }
             Asset::delete_file(path);
-            msgbox->destroy();
+            pp::panopainter::close_legacy_dialog_node(*msgbox);
         };
         (void)pp::panopainter::attach_legacy_overlay_node_to_root(*this, msgbox);
         root()->update();

src/node_dialog_open.cpp

@@ -60,7 +60,7 @@ void NodeDialogOpen::init_controls()
                 image_tex->tex.reset();
             }
             Asset::delete_file(path);
-            msgbox->destroy();
+            pp::panopainter::close_legacy_dialog_node(*msgbox);
         };
         (void)pp::panopainter::attach_legacy_overlay_node_to_root(*this, msgbox);
         root()->update();