Add "Pult" access to navbar for specific user roles

Updated the navbar and added a "Pult" link. With this change, only admin users and users with a new role 'IsPultosch' will see the "Pult" link. This was added to provide these specific user groups with a quick access to this feature without cluttering the navbar for rest of the users.

homepage/navbar.template.html

@@ -15,10 +15,18 @@
                     <li class="nav-item">
                         <a class="nav-link" href="/admin">Admin</a>
                     </li>
+                    <li>
+                        <a class="nav-link" href="pult">Pult</a>
+                    </li>
                     <li class="nav-item">
                         <a class="nav-link" href="/topup">Feltöltés</a>
                     </li>
                 {{- else }}
+                    {{- if .User.IsPultosch }}
+                    <li class="nav-item">
+                        <a class="nav-link" href="/pult">Pult</a>
+                    </li>
+                    {{- end }}
                     <li class="nav-item">
                         <a class="nav-link" href="#" onclick="alert('Keresd a reszort gazdaságist!')">Feltöltés</a>
                     </li>