Disable the 'Run gitlab-rulez' button if not action is required

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

templates/index.html.jinja2

@@ -187,7 +187,7 @@
 
   <div>
     {% if meta.new_pipeline_url -%}
-    <a class="btn btn-primary"
+    <a class="btn btn-primary {{'disabled' if not summary.wrong_settings_count }}"
         href="{{- meta.new_pipeline_url -}}&amp;var[TRIGGER_GITLAB_RULEZ]=apply
       ">Run gitlab-rulez</a>
     <a class="btn btn-primary {{'disabled' if not summary.total_updates_count }}"