ui: disable spellcheck for pertest (#629) (#630)

packages/ui-default/templates/manage_user_import.html

@@ -11,7 +11,8 @@
     {{ form.form_textarea({
         columns:null,
         label:'Users',
-        name:'users'
+        name:'users',
+        nospellcheck: true
         }) }}
     <div class="row"><div class="column">
       <button name="preview" class="rounded primary button">{{ _('Preview') }}</button>