The easiest (and only real) way would be to move the 'active' class onto the tab and the container. You could write your own JS script to modify this and have the script load on the settings page. This would then ensure that you could still update the plugin with future releases.
would do the job. Even:
should do what your after. Of course, if your happy to make those change via hardcoding them on the /includes/screens/settings.php file then that would work also.
As I'm sure you would imagine, that isn't something that can or should be changed in the mainstream plugin release as its quite a particular function that is only suited to you so a personal fix for this is the only way to go ;)
Give the above a go and let me know.