#121 Deferred parcels

* improves filtering by gmrkng and krs
* implements deferred loading of parcels on spatial referenced data objects
* adds HTMX to project
* improves detail view layout (mainly interesting for smaller displays/mobile)

templates/public_base.html

@@ -10,6 +10,7 @@
     {% bootstrap_javascript jquery='full' %}
     {% fontawesome_5_static %}
     <link rel="stylesheet" href="{% static 'css/konova.css' %}">
+    <script src="https://unpkg.com/htmx.org@1.6.1"></script>
 
     {% block head %}
     {% endblock %}