add: case "cmd_selectAll": 
context:     supportsCommand: function(command)    {        switch(command) {        case "cmd_delete":        case "cmd_shiftDelete":        case "button_delete":        case "cmd_open":        case "file_message_button":        case "goto_folder_button":        case "saveas_vf_button":            return true;        default:            return false;        }    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4da33fb0827507170c684f6b92797b78287cf761/SearchDialog.js/buggy/mailnews/base/search/resources/content/SearchDialog.js