fix bug 1547 move about.html from content to locale

r=mcafee

suite/common/utilityOverlay.js

@@ -258,7 +258,7 @@ function goAboutDialog()
   if( defaultAboutState )
   	window.openDialog("chrome:global/content/about.xul", "About", "modal,chrome,resizable=yes,height=450,width=550");
   else 
-    window.openDialog( getBrowserURL(), "_blank", "chrome,all,dialog=no", 'chrome://global/content/about.html' );
+    window.openDialog( getBrowserURL(), "_blank", "chrome,all,dialog=no", 'chrome://global/locale/about.html' );
 }