Make sure measuring spans are removed from all elements (including the ones that were changed).  Resolves second half of issue #576.
Make sure measuring spans are removed from all elements (including the ones that were changed).  Resolves second half of issue #576.

wikimedia/MathJax,minrk/components-mathjax,minrk/mathjax-component,mcanthony/MathJax,louisd67/formules-science,thomasjm/MathJax,anueshenxing/MathJax,physikerwelt/mathoid-server,perseoq/MathJax,mcanthony/MathJax,dpvc/MathJax,wikimedia/mathoid,cben/MathJax,ManrajGrover/MathJax,kwangkim/mathoid,thomasjm/MathJax,thomasjm/MathJax,Galadirith/MathJax,Ivanwangcy/MathJax,MonashAlexandria/mathoid,wikimedia/mathoid,anusornc/MathJax,Edraak/MathJax,Edraak/MathJax,anueshenxing/MathJax,wikimedia/mathoid,nvp2211/MathJax,physikerwelt/mathoid-server,jeremykenedy/MathJax,GerHobbelt/MathJax,cheerfulstoic/MathJax,jinntrance/mathjax,nvp2211/MathJax,kwangkim/mathoid,kwangkim/mathoid,physikerwelt/mathoid-server,physikerwelt/MathJax,ManrajGrover/MathJax,perseoq/MathJax,minrk/mathjax-component,cheerfulstoic/MathJax,anusornc/MathJax,MonashAlexandria/mathoid,Ivanwangcy/MathJax,thomasjm/MathJax,wikimedia/mathoid,rachetfoot/MathJax,kwangkim/mathoid,minrk/components-mathjax,jeremykenedy/MathJax,cben/MathJax,thomasjm/MathJax,GerHobbelt/MathJax,jinntrance/mathjax