Project-delete: show success-message after delete

projects/templates/projects/project_list.html

@@ -27,6 +27,15 @@
 
 <div class="m-4"><!-- main content -->
 
+    {% if messages %}
+    <ul class="mb-4">
+        {% for message in messages %}
+            {# if we introduce different levels we can use{% message.level == DEFAULT_MESSAGE_LEVELS.SUCCESS %} #}
+            <li class="bg-cyan-50 dark:bg-cyan-900 border-2 border-cyan-800 dark:border-cyan-400 p-4 rounded-lg">{{ message }}</li>
+        {% endfor %}
+    </ul>
+    {% endif %}
+
 <div class="flex bg-slate-50 dark:bg-slate-800 mt-4 items-end">
     <div class="flex">
     <a href="{% url "project_list_mine" %}"><div class="p-4 font-bold text-xl hover:bg-slate-200 dark:hover:bg-slate-800 {% if ownership_filter == "mine" %}text-cyan-500 dark:text-cyan-300 border-cyan-500 border-b-4 {% else %}text-slate-500 dark:text-slate-300 hover:border-b-4 hover:border-slate-400{% endif %}">My Projects</div></a>