templates: fix user form alignment

Add class="mx-5" to allign the form with the header of the page.

ogcp/templates/auth/delete_user.html

@@ -12,6 +12,7 @@
 {{ wtf.quick_form(form,
                   action=url_for('user_delete_post'),
                   method='post',
-                  button_map={'submit_btn':'primary'}) }}
+                  button_map={'submit_btn':'primary'},
+                  extra_classes="mx-5") }}
 
 {% endblock %}

ogcp/templates/auth/user_form.html

@@ -9,7 +9,7 @@
 
 <h2 class="mx-5 subhead-heading">{% block subhead_heading %}{% endblock %}</h2>
 
-<form action="{% block form_action %}{% endblock %}" method="post" class="form">
+<form action="{% block form_action %}{% endblock %}" method="post" class="form mx-5">
     {{ form.hidden_tag() }}
 
     <div class="form-group">