CON-1780 Implementing new GlobalFooter layout for Venus

Venus redesign new footer implementation.

https://wikia-inc.atlassian.net/browse/CON-1780
This color is already defined in venus. While it's used not only on GlobalNavigation I suggest extracting it to separate file and use it in both places. It could be ```extentions/wikia/Venus/styles/color.scss```, but I'm open for different approaches.