Livetable suggest input field has no title

Steps to reproduce

• Go to the movies application provided by the help center
• Change the director column ("databaseList1") into a suggest field: 'databaseList1': {"suggest":true, "size":10}

Expected behaviour

The generated filter input contains a title such as "Filter for field director", that can be read typically by screen readers, just like the other generated livetable filters.

Actual behaviour

The generated input consists of the HTML below, where the input element has no title attribute:

<div class="selectize-control suggest-propertyValues multi">
  <div class="selectize-input items not-full has-options">
    <input type="select-multiple" autocomplete="off" tabindex="" id="xwiki-livetable-movies-filter-5-selectized" style="width: 4px; opacity: 1; position: relative; left: 0px;">
  </div>
</div>