Center Twitter Bootstrap 3 Glyphicons in buttons

Question

I am now using Twitter Bootstrap 3 RC2 as well as Twitter Bootstrap which has moved into a separate repository. I have noticed, if used in a button with text the icon is no

Answer 1

Move the text out of the with the glyphicon and apply vertical-align: middle; to the

  
     Centered
  

Demo

This works in Bootstrap 4 with Font Awesome icons like so

     Centered