added and fixed study conf breadcrumb

smash/web/templates/study/breadcrumb.html

+<li><a href="{% url 'web.views.appointments' %}"><i class="fa fa-dashboard"></i> Dashboard</a></li>
+<li>Configuration</li>
+<li class="active"><a href="{% url 'web.views.edit_study' study_id %}">Study</a></li>
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