Created by: zalog
Vertical centering .navbar-brand and .navbar-toggler.
Please check this pen: http://codepen.io/zalog/pen/zZXbwz
Since this great fix #22230, the comment here https://github.com/twbs/bootstrap/pull/22355/files#diff-df1f74faf207a474f1d78c86393221c8L105 is not relevant anymore. cc: https://github.com/twbs/bootstrap/pull/21626#issuecomment-292129473