add: case "cmd_delete": case "file_message_button": 
context:     supportsCommand: function(command)    {        switch(command) {        case "cmd_open":            return true;        default:            return false;        }    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/a61462049b334d8b4055ec16e5068b192dec36e8/SearchDialog.js/buggy/mailnews/base/search/resources/content/SearchDialog.js