Add Theme Support in config.php

[echosalik]

Please add theme support from config.php file so that custom theme can be used from that. I have made a version of mine for that, I can commit and push it. If you deem it worthy, please include it in your version.

[amrbedair]

yes please add a pull request, and let us review it Thanks

[echosalik]

I have added a pull request. Please review. Regards