Navigation is composed of two bars: navTabs on top and tabLinks on bottom. I'm trying to reduce only the height of the bottom bar (tabLinks). I can do so using extra.css but I get a gap between navigation and pageContent. There is a style property in the header section that controls tab height, but it controls the height of both navigation bars and is probably the source of my problem. Does anyone know how to control the height of these two bars independently?