Thread:Semantic-mediawiki.org:Community portal/Please add Greek flag to MediaWiki:Common.css

I've just translated Main Page to Greek language (el): Σημασιολογικό MediaWiki and also uploaded Greek flag:

Can someone please add:

to MediaWiki:Common.css so as for the flag to show on the language template?

Or maybe give me the appropriate rights to do it myself.

Thanks!