Fix navbar-toggle after commit bbee78b30b40ff0b1473a06ea7ecf5a42d51b614

The following commit introduced an issue with the navbar toggle placement:
https://github.com/twitter/bootstrap/commit/bbee78b30b40ff0b1473a06ea7ecf5a42d51b614
Merge pull request #7716 from burnsra/3.0.0-wip-navbar

Fix navbar-toggle after commit bbee78b30b40ff0b1473a06ea7ecf5a42d51b614