add: case "button_delete": 
context:    supportsCommand: function(command)	{		switch ( command )		{			case "cmd_selectAll":			case "cmd_delete":				return true;						default:				return false;		}	},
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/26fbbb140ddd210eae5945dfc04dfa2ace7bfbbf/widgetglue.js/buggy/mailnews/base/resources/content/widgetglue.js