Style menu items on :focus identically to :hover
Style menu items on :focus identically to :hover

* Add a :focus definition for anchors in nav tags to the selector
  for a:hover
* Remove the outline from focused anchors

unicef/polio,SeedScientific/polio,unicef/rhizome,SeedScientific/polio,SeedScientific/polio,unicef/polio,SeedScientific/polio,unicef/polio,SeedScientific/polio,unicef/rhizome,unicef/rhizome,unicef/rhizome,unicef/polio