More exposed map layer controls

[wardseward]

I really like the map layover features (lightning, weather, aurora, ...) but I don't aways want them on. Going into settings is a bit cumbersome to do often. So, I think putting a few more buttons in the map "zooming bar", like you did with the label toggle. That way you can toggle map layers (maybe not all of them) right from the map.

[alanhargreaves]

In the current version layers can be enabled and disabled with hot keys. Try hitting a '?'.