Menu bar cuts through map on scroll or resolution change

The menu bar doesn't anchor to the bottom of `<body>` if the resolution is lower than the map, requiring a scroll. I noticed this when using the Chrome console, and re-sizing causes the menu to sit about 20px above the console bar. This could easily be fixed by putting the menu at the top, above `<div id='wrapper'>`, but that's a style issue, so is ultimately up to @Continuities.
