oops, include the string bundle <script> tag so that you can actually delete filters r=sspitzer

fix for #40337

mailnews/base/search/resources/content/FilterListDialog.xul

@@ -31,6 +31,7 @@ Rights Reserved.
   title="&window.title;">
 
 <script language="JavaScript" src="chrome://messenger/content/FilterListDialog.js"/>
+<script language="JavaScript" src="chrome://global/content/strres.js"/>
 <!-- <script src="resource:/res/samples/DumpDOM.js"/> -->
 <keyset id="keyset"/>