So my creative team does not like the Sencha themes available. Cupertino seems the blandest one, and I have made a neatened extract that they can customise this. Using the ServerModule.CustomCSS property I load the custom cupertino.css and that works perfectly. However They which to add additional css classes to buttons labels edits etc. This post: here seems to be the way to go invoking these custom classes, however the config property that is passed in function beforeInit(sender, config) will differ for every type of control. Where can I find a reference to the various config objects available?