Merge pull request #1793 from MITx/fix/btalbot/studio-headerwidth

studio - resolving broken nav element width in smaller windows

cms/static/sass/elements/_header.scss

@@ -132,7 +132,7 @@
 
 // specific elements - course nav
 .nav-course {
-  width: 335px;
+  width: 285px;
   margin-top: -($baseline/4);
   @include font-size(14);