Sidebar styles should change with map style

[colinsheppard]

I really like the sidebar with a transparent background as a default, BUT, when the map style is changed to "light" of "streets" the CSS of the sidebar should also be updated to turn the text to black or to bring the background color back in, either option is fine.

When map style is "satellite" the background color should be used (instead of text color) because the color of the map is both light and dark depending on what is in view.