Refactor group detail and musikgame detail templates for improved owner visibility and styling; update CSS for music count display

game/templates/game/musikgame_detail.html

@@ -13,9 +13,7 @@
     <h2>
         <i class="ri-group-2-fill"></i> Joueurs
     </h2>
-    <ul>
-        {% for member in musikgame.players.all %}<li>{{ member }}</li>{% endfor %}
-    </ul>
+    <p>{{ musikgame.players.all|join:", " }}</p>
     <h2>
         <i class="ri-music-2-fill"></i> Musiques
     </h2>