Fix translation tag for datepicker
To fix translation tag for datepicker, this patch uses 'block' tag
instead 'blocktrans' tag.
{% load i18n %}
-{% blocktrans trimmed %}
+{% block trimmed %}
<div class='input-group date'>
{{ datepicker_input }}
<label class="sr-only">{{ datepicker_label }}</label>
<span class="fa fa-calendar"></span>
</span>
</div>
-{% endblocktrans %}
+{% endblock %}
