Hi, I want to override a core admin template (WidgetAreaEditor.ss), but I am not sure how to go about it. I am setting my theme in _config.php, but I notice that in LeftAndMain.php's init() method, the following happens:

      // The user's theme shouldn't affect the CMS, if, for example, they have replaced
      // TableListField.ss or Form.ss.
      SSViewer::set_theme(null);

This seems to make it difficult to set the admin theme, I have tried using an Extension to LeftAndMain, but its init() method is called before that of LeftAndMain, meaning I can't set the theme here.

Has anyone else managed to change/override the admin theme successfully?

Thanks,

Ross