retrait de page html redondantes, ajout de la modification des username et affichage des userrname au lieu des noms complets

templates/pages/tryout_form.html

@@ -56,7 +56,7 @@
                         <option value="">-- No target team --</option>
                         {% for team in org_teams %}
                         <option value="{{ team.id }}" {% if tryout and tryout.target_org_team_id == team.id %}selected{% endif %}>
-                            {{ team.name }}{% if team.coach %} (Coach: {{ team.coach.full_name }}){% endif %}
+{{ team.name }}{% if team.coach %} (Coach: {{ team.coach.username }}){% endif %}
                         </option>
                         {% endfor %}
                     </select>
@@ -67,7 +67,7 @@
                         <option value="">-- No manager assigned --</option>
                         {% for manager in managers %}
                         <option value="{{ manager.id }}" {% if tryout and tryout.manager_id == manager.id %}selected{% endif %}>
-                            {{ manager.full_name }}
+{{ manager.username }}
                         </option>
                         {% endfor %}
                     </select>
@@ -80,7 +80,7 @@
                         <option value="">-- No coach assigned --</option>
                         {% for coach in coaches %}
                         <option value="{{ coach.id }}" {% if tryout and tryout.coach_id == coach.id %}selected{% endif %}>
-                            {{ coach.full_name }}
+{{ coach.username }}
                         </option>
                         {% endfor %}
                     </select>