Bug 358120 - add id attributes to passwordManager.xul, r=gavin.sharp

toolkit/components/passwordmgr/content/passwordManager.xul

@@ -80,7 +80,7 @@
         <treechildren/>
       </tree>
       <separator class="thin"/>
-      <hbox>
+      <hbox id="SignonViewerButtons">
         <button id="removeSignon" disabled="true" icon="remove"
                 label="&remove.label;" accesskey="&remove.accesskey;"
                 oncommand="DeleteSignon();"/>