anchor.diff:      </form>
   
       <table class="list-table selectable-table sortable tablesorter tw-text-sm">
  -        <thead class="hidden-xs hidden-sm">
  +        <thead class="hidden-xs hidden-sm print:tw-table-header-group">
           <tr>
               <th scope="col"><%-- placeholder to ensure correct number of th --%></th>
               <th scope="col" class="sortable-field"><spring:message code="person.data.firstName"/></th>
  
positive.code:                         </c:otherwise>
                      </c:choose>
                  </td>
                  <td class="is-centered hidden-xs hidden-sm">
                      <c:choose>
                          <c:when test="${accounts[person] != null}">
                              <uv:number number="${accounts[person].remainingVacationDays}"/>
  
negative.code:                         </c:otherwise>
                      </c:choose>
                  </td>
                  <td class="is-centered hidden-xs hidden-sm print:tw-table-cell">
                      <c:choose>
                          <c:when test="${accounts[person] != null}">
                              <uv:number number="${accounts[person].annualVacationDays}"/>
  