made the listWidget redraw at every timeupdate event (added a small optimization though,
to make sure that the widget isn't redrawn all the time).
{{! template used by the jquery ui tooltip }}
<div class='Ldt-tooltip'>
<div class='title'>{{title}}</div>
<div class='time'>{{begin}} : {{end}} </div>
<div class='description'>{{description}}</div>
</div>