Fix mobile navbar in docs

Author: stevoland

docs/assets/style.css

@@ -22,6 +22,10 @@ body {
   color: #fafafa;
 }
 
+.bs-docs-nav .navbar-collapse {
+  overflow: hidden;
+}
+
 @media (min-width: 768px) {
 
   .bs-docs-nav .navbar-nav>li>a {

docs/src/NavMain.js

@@ -28,7 +28,7 @@ var NavMain = React.createClass({
 
     return (
       <Navbar componentClass='header' brand={brand} staticTop className="bs-docs-nav" role="banner" toggleNavKey={0}>
-        <Nav className="bs-navbar-collapse" role="navigation" key={0} id="top">
+        <Nav className="bs-navbar-collapse" role="navigation" eventKey={0} id="top">
           {Object.keys(NAV_LINKS).map(this.renderNavItem)}
         </Nav>
       </Navbar>
@@ -46,4 +46,4 @@ var NavMain = React.createClass({
   }
 });
 
-module.exports = NavMain;
+module.exports = NavMain;