Add phase update page

apps/participation/templates/participation/phase_form.html

@@ -0,0 +1,14 @@
+{% extends "base.html" %}
+
+{% load crispy_forms_filters i18n %}
+
+{% block content %}
+    <form method="post">
+        <div id="form-content">
+            {% csrf_token %}
+            {{ form|crispy }}
+        </div>
+        <button class="btn btn-primary" type="submit">{% trans "Update" %}</button>
+    </form>
+{% endblock content %}
+