114169 - Use hasAttribute (which will be optimized even further soon) to avoid excessive string copying. r=ben sr=hewitt

113582 - put global xbl widgets on a diet. r=ben sr=hewitt

xpfe/global/resources/content/xul.css

@@ -52,7 +52,7 @@ iframe {
   -moz-user-focus: normal;
 }
 
-menulist[editable="true"],
+menulist[editable],
 popup, menupopup, tooltip, 
 scrollbar, scrollbarbutton, slider, thumb, autorepeater,
 splitter, statusbar, statusbarpanel,
@@ -572,7 +572,7 @@ menulist {
   -moz-binding: url("chrome://global/content/bindings/menulist.xml#menulist");
 }
 
-menulist[editable="true"] {
+menulist[editable] {
   -moz-binding: url("chrome://global/content/bindings/menulist.xml#menulist-editable");
 }