- some cleanup

- refactored batch size

lib/python/Products/PluginIndexes/dtml/browseIndex.dtml

 <dtml-var manage_page_header>
 <dtml-var manage_tabs>
+
 <dtml-call "REQUEST.RESPONSE.setHeader('Content-Type', 'text/html; charset=UTF-8')" >
 
 <p class="form-text">
 The index "&dtml-getId;" contains <dtml-var items fmt=collection-length thousands_commas> distinct values
 </p>
 
-<div class="form-text">
-  <dtml-in items previous size=20 start=query_start >
+<dtml-let size="20"> <!-- batch size -->
+
+  <div class="form-text">
+    <dtml-in items previous size=size start=query_start >
         <a href="&dtml-URL;?query_start=&dtml-previous-sequence-start-number;">
         [Previous <dtml-var previous-sequence-size> entries]
       </a>
     </dtml-in>
-  <dtml-in items next size=20 start=query_start >
+    <dtml-in items next size=size start=query_start >
       <a href="&dtml-URL;?query_start=&dtml-next-sequence-start-number;">
         [Next <dtml-var next-sequence-size> entries]
       </a>
     </dtml-in>
-</div>
-
+  </div>
 
-<table border="1" align="center" width="100%" class="form-help">
-  <dtml-in items start=query_start>
+  <table border="1" align="center" width="100%" class="form-help">
+    <dtml-in items start=query_start size=size>
       <tr>
         <td>
           <dtml-if "meta_type in ('DateIndex',)">
@@ -45,5 +47,7 @@ The index "&dtml-getId;" contains <dtml-var items fmt=collection-length thousand
         </td>
       </tr>
     </dtml-in>
+  </table>
+</dtml-let>
 
 <dtml-var manage_page_footer>