Allow to create group and its contest on UI

templates/widgets/datetimepicker.html

@@ -0,0 +1,20 @@
+<input
+    type="{{ widget.type }}"
+    name="{{ widget.name }}"
+    {% if widget.value != None %} 
+        value="{{ widget.value }}"
+    {% endif %}
+    {% for name, value in widget.attrs.items() %}
+        {% if value %}
+            {{ name }}{% if not value %}="{{ value }}"{% endif %}
+        {% endif %}
+    {% endfor %}
+/>
+
+<script>
+    $(function () {
+        $("input[name='{{ widget.name }}']").datetimepicker({
+            format: 'Y-m-d H:i:s',
+        });
+    });
+</script>