Centralize canvas progress teardown

src/node_remote_page.cpp

@@ -6,6 +6,7 @@
 #include "asset.h"
 #include "node_text.h"
 #include "node_metadata.h"
+#include "legacy_ui_overlay_services.h"
 
 Node* NodeRemotePage::clone_instantiate() const
 {
@@ -55,7 +56,7 @@ std::future<bool> NodeRemotePage::load_url(const std::string& url,
             m_content->add_child_xml(std::string((char*)remote->m_data, (size_t)remote->m_len), "about");
             if (auto meta = m_content->find<NodeMetadata>("metadata"))
                 m_page_id = std::stol(meta->m_props["page-id"]);
-            align->destroy();
+            pp::panopainter::destroy_legacy_node(*align);
         }
         else
         {