Only participants in a valid team can see the draw

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

draw/templates/draw/index.html

@@ -1,6 +1,7 @@
 {% extends "base.html" %}
 
 {% load static %}
+{% load i18n %}
 
 {% block content %}
     {# The navbar to select the tournament #}
@@ -25,6 +26,10 @@
              aria-labelledby="tab-{{ tournament.id }}" tabindex="0">
             {% include "draw/tournament_content.html" with tournament=tournament %}
         </div>
+    {% else %}
+        <div class="alert alert-warning">
+            {% trans "You don't participate to any tournament." %}
+        </div>
     {% endfor %}
     </div>
 {% endblock %}