Some final styling tweaks

src/personalisation/static/personalisation/segment/form.css

@@ -6,7 +6,6 @@
 
     .block_container .block {
         display: block;
-        float: left;
         box-sizing: border-box;
         position: relative;
         width: calc(100% / 3 - 13.33px);

src/personalisation/templates/modeladmin/personalisation/segment/create.html

@@ -7,6 +7,9 @@
         {% include "wagtailadmin/shared/header.html" with title=view.get_page_title subtitle=view.get_page_subtitle icon=view.header_icon tabbed=1 merged=1 %}
     {% endblock %}
 
+
+    {{ modal_content }}
+
     <form action="{% block form_action %}{{ view.create_url }}{% endblock %}" {% if is_multipart %} enctype="multipart/form-data"
         {% endif %} method="POST" novalidate>
         {% csrf_token %} {% block form %}{{ edit_handler.render_form_content }}{% endblock %}