added an option to force the redraw of a list, even if the cached lists are the
same (which is the case when we just added another annotation)
{{! template for an annotation displayed in a segmentWidget }}
<div title='{{divTitle}}' id='{{id}}'
class='Ldt-iri-chapter'
style='left: {{startPixel}}px;
width: {{pxWidth}}px;
background-color:#{{hexa_color}};'
>
</div>