Bug 1446157 - Follow-up, Remove unused grippyhidden="true" attribute from Layout Debugger r=dbaron

MozReview-Commit-ID: 6Kbn7oB7svH

--HG--
extra : rebase_source : 6c5141c437389e2ff9802c10488d2d2ffc5ad850

layout/tools/layout-debug/ui/content/layoutdebug.xul

@@ -49,7 +49,7 @@
   <vbox flex="1">
 
     <toolbox>
-      <menubar id="main-menubar" grippyhidden="true">
+      <menubar id="main-menubar">
         <menu id="menu_file" label="File" accesskey="F">
           <menupopup id="menu_FilePopup">
             <menuitem id="menu_open" label="&ldb.Open.label;" accesskey="&ldb.Open.accesskey;" key="openFileKb" oncommand="openFile()"/>
@@ -92,7 +92,7 @@
         <menu id="menu_Help"/>
       </menubar>
 
-      <toolbar grippyhidden="true">
+      <toolbar>
         <toolbarbutton id="back-button" class="toolbarbutton-1"
                        label="&ldb.BackButton.label;"
                        oncommand="gBrowser.goBack();" />