Various layout fixes and enhancement

Closes #82 (closed), #84 (closed), #85 (closed), #107 (closed) and other improvements

issue	before	after
Doublon du bloc action dans les détails des pro... (#82 - closed)
top bar (en haut) et side nav (à gauche) : clar... (#84 - closed)
service details & profil details : empêcher le ... (#85 - closed)
absence de wrap sur les token (#107 - closed)

hiboo/templates/sidebar.html

@@ -85,9 +85,11 @@
   </a>
 </li>
 
+{% if current_user.is_authenticated %}
 <li class="nav-header"></li>
 <li class="nav-item">
-  <a class="nav-link border border-warning text-warning" href="{{ url_for("account.signout") }}">
-    <i class="nav-icon fas fa-power-off"></i> <p class="text-bold">{% trans %}Sign out{% endtrans %}</p>
+  <a class="nav-link border" href="{{ url_for("account.signout") }}">
+    <i class="nav-icon fas fa-power-off"></i> <p>{% trans %}Sign out{% endtrans %}</p>
   </a>
 </li>
+{% endif %}