add redirect if vehicle is not configured and flash messages

app/templates/editVehicleForm.html

@@ -5,7 +5,7 @@
 <div class="col-md-8">
     <div class="panel panel-default">
         <div class="panel-body">
-            <h3>Edit vehicle</h3>
+            <h3>Edit vehicle '{{vehicle.name}}'</h3>
             <form class='form-horizontal' method="POST">
                 {{ form.hidden_tag() }}
                 {{ render_field_with_errors(form.name) }}