Add a get view and template that enable changing team members email

app/templates/views/manage-users.html

@@ -64,6 +64,8 @@
                 <a href="{{ url_for('.cancel_invited_user', service_id=current_service.id, invited_user_id=user.id)}}">Cancel invitation</a>
               {% elif user.state == 'active' and current_user.id != user.id %}
                 <a href="{{ url_for('.edit_user_permissions', service_id=current_service.id, user_id=user.id)}}">Edit permissions</a>
+                <br>
+                <a href="{{ url_for('.edit_user_email', service_id=current_service.id, user_id=user.id)}}">Edit user email</a>
               {% endif %}
             </li>
           {% endif %}

app/templates/views/manage-users/edit-user-email.html

@@ -0,0 +1,27 @@
+{% extends "withoutnav_template.html" %}
+{% from "components/textbox.html" import textbox %}
+{% from "components/page-footer.html" import page_footer %}
+{% from "components/form.html" import form_wrapper %}
+
+{% block per_page_title %}
+  Edit user email
+{% endblock %}
+
+{% block maincolumn_content %}
+
+  <h1 class="heading-large">Edit user email</h1>
+  <p id="user_name">for {{ user.name }}</p>
+  <div class="grid-row">
+    <div class="column-three-quarters">
+      {% call form_wrapper() %}
+        {{ textbox(form.email_address) }}
+        {{ page_footer(
+          'Save',
+          back_link=url_for('.manage_users', service_id=service_id),
+          back_link_text="Back to team members"
+        ) }}
+      {% endcall %}
+    </div>
+  </div>
+
+{% endblock %}