fixed a bug where clicks on the slider foreground would not be taken into account.
{{! template for an annotation displayed in a segmentWidget }}
<div title='{{divTitle}}' id='{{id}}'
class='ui-slider-range ui-slider-range-min ui-widget-header Ldt-iri-chapter'
style='left: {{startPourcent}}%;
width: {{endPourcent}}%;
background:#{{hexa_color}};'
>
</div>