Readding a line that shouldn't have been removed. r=hewitt

xpfe/components/find/resources/finddialog.xul

@@ -44,6 +44,7 @@ Contributor(s):
   persist="screenX screenY">
 
   <script type="application/x-javascript" src="chrome://global/content/finddialog.js"/>
+  <script type="application/x-javascript" src="chrome://global/content/dialogOverlay.js"/>
   <stringbundle id="findBundle" src="chrome://global/locale/finddialog.properties"/>
   
   <grid>