add bootstrap form-control to spawner form inputs

share/jupyter/hub/templates/spawn.html

@@ -7,12 +7,21 @@
     <h1>Spawner options</h1>
   </div>
   <div class="row col-sm-offset-2 col-sm-8">
-    <form id="spawn_form" action="{{base_url}}spawn" method="post">
+    <form id="spawn_form" action="{{base_url}}spawn" method="post" role="form">
       {{spawner_options_form}}
       <br>
-      <input type="submit" value="Spawn">
+      <input type="submit" value="Spawn" class="btn btn-jupyter">
     </form>
   </div>
 </div>
 
 {% endblock %}
+
+{% block script %}
+<script type="text/javascript">
+require(["jquery"], function ($) {
+  // add bootstrap form-control class to inputs
+  $("#spawn_form").find("input, select, textarea, button").addClass("form-control");
+});
+</script>
+{% endblock %}