Make 'API key was revoked' banner green

app/assets/stylesheets/components/banner.scss

@@ -1,5 +1,6 @@
 %banner,
-.banner {
+.banner,
+.banner-default {
 
   @include core-19;
   background: $turquoise;

app/main/views/api_keys.py

@@ -51,5 +51,5 @@ def revoke_api_key(service_id, key_id):
         )
     elif request.method == 'POST':
         api_key_api_client.revoke_api_key(service_id=service_id, key_id=key_id)
-        flash('‘{}’ was revoked'.format(key_name))
+        flash('‘{}’ was revoked'.format(key_name), 'default')
         return redirect(url_for('.api_keys', service_id=service_id))

app/templates/admin_template.html

@@ -73,7 +73,11 @@
       {% with messages = get_flashed_messages(with_categories=true) %}
         {% if messages %}
           {% for category, message in messages %}
-            {{ banner(message, 'dangerous', delete_button="Yes, delete this template" if 'delete' == category else None)}}
+            {{ banner(
+              message,
+              'default' if category == 'default' else 'dangerous',
+              delete_button="Yes, delete this template" if 'delete' == category else None
+            )}}
           {% endfor %}
         {% endif %}
       {% endwith %}