Remove Web Panels detritus from XUL. Change defaults so that throbber is visible in the menu bar.

browser/base/content/browser.xul

@@ -176,9 +176,6 @@
                  type="checkbox" group="sidebar" sidebarurl="chrome://browser/content/history/history-panel.xul"
                  oncommand="toggleSidebar('viewHistorySidebar');"/>
 
-    <broadcaster id="viewWebPanelsSidebar" autoCheck="false" label="&webPanelsButton.label;"
-                 type="checkbox" group="sidebar" sidebarurl="chrome://browser/content/web-panels.xul"
-                 oncommand="toggleSidebar('viewWebPanelsSidebar');"/>
   </broadcasterset>
 
   <keyset id="mainKeyset">
@@ -566,7 +563,7 @@
   <toolbox id="navigator-toolbox" class="toolbox-top" mode="icons" iconsize="small">
     <!-- Menu -->
       <toolbar type="menubar" id="toolbar-menubar" class="chromeclass-menubar" customizable="true"
-               defaultset="menubar-items" mode="icons" iconsize="small">
+               defaultset="menubar-items,spring,throbber-box" mode="icons" iconsize="small">
         <toolbaritem id="menubar-items" align="center">
           <menubar id="main-menubar" style="border:0px;padding:0px;margin:0px;-moz-appearance:none">
             <menu label="&fileMenu.label;"
@@ -650,7 +647,6 @@
                     <menuitem key="key_openDownloadsSidebar" observes="viewDownloadsSidebar"/>
                     <menuitem key="viewBookmarksSidebarKb" observes="viewBookmarksSidebar"/>
                     <menuitem key="key_gotoHistory" observes="viewHistorySidebar"/>
-                    <menuitem observes="viewWebPanelsSidebar"/>
                   </menupopup>
                 </menu>            
                 <menuseparator/>