fixes bug on credentials list

app/views/credentials/index.html.haml

@@ -5,7 +5,7 @@
 = render 'servers/header', :active_nav => :credentials
 .pageContent.pageContent--compact
   - if @credentials.empty?
-    .noData..noData--clean
+    .noData.noData--clean
       %h2.noData__title There are no credentials for this server.
       %p.noData__text
         In order to authenticate to your mail server, you use credentials. Once