fixed search box issue on the off canvas and also added a class to one-third sized tiles so that they degrade down to one-half on medium sized screens instead of jarring to one-whole too soon.

Signed-off-by: tdaffron <tdaffron@gmail.com>
Merge pull request #99 from CruGlobal/navigation

fixed search box issue on the off canvas and also added a class to one-t...
Merge branch 'master' of github.com:CruGlobal/patterns into s-dev