Updating the help patch (which was pulled from the branch) to the $!@#'ing xul syntax changes. r=hewitt sr=hyatt

extensions/help/resources/content/help.js

@@ -229,12 +229,12 @@ function print()
 
 function createBackMenu(event)
 {
-  FillHistoryMenu(event.target, "back");
+  return FillHistoryMenu(event.target, "back");
 }
 
 function createForwardMenu(event)
 {
-  FillHistoryMenu(event.target, "forward");
+  return FillHistoryMenu(event.target, "forward");
 }
 
 function gotoHistoryIndex(aEvent)

extensions/help/resources/content/help.xul

@@ -40,8 +40,8 @@
   <script type="application/x-javascript" src="chrome://global/content/nsJSSupportsUtils.js"/>
 
   <popupset id="aTooltipSet">
-    <popup id="backMenu" oncreate="createBackMenu(event);" oncommand="gotoHistoryIndex(event);"/>
-    <popup id="forwardMenu" oncreate="createForwardMenu(event);" oncommand="gotoHistoryIndex(event);"/>
+    <popup id="backMenu" position="after_start" onpopupshowing="return createBackMenu(event);" oncommand="gotoHistoryIndex(event);"/>
+    <popup id="forwardMenu" position="after_start" onpopupshowing="return createForwardMenu(event);" oncommand="gotoHistoryIndex(event);"/>
   </popupset>
   <popupset id="contentAreaContextSet"/>
   <broadcasterset id="helpBroadcasters">
@@ -94,12 +94,12 @@
         <menubutton id="helpBackButton" label="&backBtn.label;" tooltiptext="&backButton.tooltip;"
                     oncommand="gotoHistoryIndex(event);" buttonaction="goBack();" context="backMenu"
                     class="menubutton-dual top" crop="right" tooltip="aTooltip" observes="canGoBack">
-          <menupopup context="" oncreate="createBackMenu(event);"/>
+          <menupopup context="" onpopupshowing="createBackMenu(event);"/>
         </menubutton>
         <menubutton id="helpForwardButton" label="&fwdBtn.label;" tooltiptext="&forwardButton.tooltip;"
                     oncommand="gotoHistoryIndex(event);" buttonaction="goForward();" context="forwardMenu"
                     class="menubutton-dual top" crop="right" tooltip="aTooltip" observes="canGoForward">
-          <menupopup context="" oncreate="createForwardMenu(event);"/>
+          <menupopup context="" onpopupshowing="createForwardMenu(event);"/>
         </menubutton>
         <button id="helpHomeButton"
                 class="button-toolbar-1 top"