Bug 210228 - Make extension list sorted (Tools | Options | Extensions), patch by pike@pikey.me.uk, r=bryner

browser/components/prefwindow/content/pref-extensions.xul

@@ -56,7 +56,9 @@
     <listbox id="extList" datasources="rdf:chrome" 
           onselect="extensionSelect();" flex="1"
           ondblclick="if (isValidLeftClick(event,'listitem')) onDoubleClick(event);"
-          ref="urn:mozilla:package:root" rows="10">
+          ref="urn:mozilla:package:root" rows="10"
+          sortResource="http://www.mozilla.org/rdf/chrome#displayName"
+          sortDirection="ascending">
       <template xmlns:chrome="http://www.mozilla.org/rdf/chrome">
         <rule chrome:extension="true">
           <listitem uri="..."