bug fix.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@5560 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/lib/form/hetero-list.jelly

@@ -12,7 +12,7 @@
     <j:forEach var="i" items="${attrs.items}">
       <j:set var="descriptor" value="${i.descriptor}" />
       <j:set var="instance" value="${i}" />
-      <div name="${attrs.name}">
+      <div name="${attrs.name}" class="repeated-chunk">
         <input type="hidden" name="kind" value="${descriptor.displayName}" />
         <table>
           <st:include from="${descriptor}" page="${descriptor.configPage}" />