rem: return (window.editorShell != null); 
add:   return (window.editorShell && !IsInHTMLSourceMode()); 
context:   isCommandEnabled: function(aCommand, dummy)  {    return (window.editorShell != null);  },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/d618542d85208467c43a26c4125a9554eeb9da81/ComposerCommands.js/clean/editor/ui/composer/content/ComposerCommands.js