Post fix for 99715. convert category tree to use outliner. r=hixie, sr=blake

xpfe/components/prefwindow/resources/content/win/platformPrefOverlay.xul

@@ -29,13 +29,13 @@
          xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
 
   <!-- Windows integration is (obviously) only applicable on Windows. -->
-  <treechildren id="advancedChildren">
-    <treeitem id="winhooks">
-      <treerow>
-        <treecell class="treecell-indent" url="chrome://communicator/content/pref/pref-winhooks.xul" label="&winhooks.label;"/>
-      </treerow>
-    </treeitem>  
-  </treechildren>
+  <outlinerchildren id="advancedChildren">
+    <outlineritem id="winhooks">
+      <outlinerrow>
+        <outlinercell url="chrome://communicator/content/pref/pref-winhooks.xul" label="&winhooks.label;"/>
+      </outlinerrow>
+    </outlineritem>  
+  </outlinerchildren>
          
 </overlay>