Add possibility to revert to old graph

[paolorotolo]

Some users are complaining about the new graph for basically 2 reasons:

• Lag on low end devices;
• Personal preferences (some liked the old one more and they don't want to change);

[ghost]

So what I would instead like to see us to is allow for customization of our graph and offer a variety of styles in the future. That said we should plan it out well so its not a mess :)