Fix to the filters on IE

- old versions of IE didn't handle an incorrect form creation as gracefully as the other browsers

- forms should not be created within a table unless it's within a <td> (it was
  on <tr> level before). The normal solution would be to encapsulate the
  entire table in a form, but since we have formlinks for the deletes /
  publishes this would get flagged as form tampering by the security
  components.

- As a fix, filter forms are created separately for the 4 search fields within their <td> now with hidden fields that keep the persistence of the previously
  entered filter terms