On IE10 and modern browsers logo can now be any size, with other navbar items auto-centering vertically. IE9 and 8 will snap these items to the top.
Fixes for layout changes on IE8 and IE9
	IE8 will now have a fixed minimum size essentially disabling responsiveness, as elements of the media queries aren't being applied even after shims
	IE9 will only display the logo at full width, which would normally cause the retina image to produce a double height navbar, however this situation is rare enough to be acceptable