[#519] Used classList instead for checking if the correct class exists, made sure to include util/lang for our classList shim
[#519] Used classList instead for checking if the correct class exists, made sure to include util/lang for our classList shim

robinparadise/videoquizmaker,mbuttu/butter,BBGInnovate/butter,mbuttu/butter,robinparadise/videoquizmaker,BBGInnovate/butter,mozilla/butter,mozilla/butter,mbuttu/butter