Bug 198264 Editor's "Toolbars" category label cannot be localised r=brade sr=alecf

editor/ui/composer/content/editorPrefsOverlay.xul

@@ -53,7 +53,7 @@
         -->
         <treeitem>
           <treerow>
-            <treecell url="chrome://editor/content/pref-toolbars.xul" label="Toolbars"/> 
+            <treecell url="chrome://editor/content/pref-toolbars.xul" label="&toolbars.label;"/> 
           </treerow>
         </treeitem>  
       </treechildren>

editor/ui/composer/locale/en-US/editorPrefsOverlay.dtd

@@ -5,4 +5,5 @@
 
 <!ENTITY compose.label "Composer">
 <!ENTITY editing.label "New Page Settings">
+<!ENTITY toolbars.label "Toolbars">
 <!ENTITY publish.label "Publishing">