rem: ShowMenuItem("folderPaneContext-compact", (numSelected <=1) && canCompact); EnableMenuItem("folderPaneContext-compact", true ); 
add: ShowMenuItem("folderPaneContext-compact", (numSelected <=1) && canCompact); EnableMenuItem("folderPaneContext-compact", true ); 
context: function SetupCompactMenuItem(targetFolder, numSelected){    var canCompact = (targetFolder.getAttribute('CanCompact') == "true");	ShowMenuItem("folderPaneContext-compact", (numSelected <=1) && canCompact);	EnableMenuItem("folderPaneContext-compact", true );	if(canCompact)	{		SetMenuItemValue("folderPaneContext-compact", gMessengerBundle.getString("compactFolder"));	}}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/0b2dd2b2d2fd037df917e07645fa019a963332a5/mailContextMenus.js/clean/mailnews/base/resources/content/mailContextMenus.js