fix: prevent "(NULL)" display in status bar context menu

Author: MrAlex94

waterfox/browser/components/statusbar/content/statusbar.xhtml

@@ -3,11 +3,10 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
-
 <overlay id="tabfeature-overlay" xmlns:html="http://www.w3.org/1999/xhtml"
     xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
     <toolbox id="navigator-toolbox">
-        <toolbar id="status-dummybar" toolbarname="Status Bar" hidden="true" />
+        <toolbar id="status-dummybar" toolbarname="Status Bar" accesskey="" hidden="true" />
     </toolbox>
     <vbox id="browser-bottombox">
         <toolbar id="status-bar" customizable="true" context="toolbar-context-menu" mode="icons"