Prevent CSS bleedthrough for box-sizing (set by Bootstrap CSS).  Resolves issue #1393.
Prevent CSS bleedthrough for box-sizing (set by Bootstrap CSS).  Resolves issue #1393.

GerHobbelt/MathJax,dpvc/MathJax,jinntrance/mathjax,GerHobbelt/MathJax,jinntrance/mathjax,wikimedia/MathJax