implement document resize with menu and dialog

src/node_dialog_browse.cpp

@@ -61,6 +61,9 @@ void NodeDialogBrowse::init_controls()
             else
             {
                 current = nullptr;
+                selected_path = "";
+                selected_file = "";
+                selected_name = "";
             }
             Asset::delete_file(path);
             msgbox->destroy();
@@ -108,6 +111,11 @@ void NodeDialogBrowse::init_controls()
 //     }
 }
 
+bool NodeDialogBrowse::is_selected()
+{
+    return current != nullptr;
+}
+
 void NodeDialogBrowse::loaded()
 {
 }