Squashed 'bundle/virtualclass/' changes from e50ae09..addc5b4

addc5b4 chat css file by php not javascript

git-subtree-dir: bundle/virtualclass
git-subtree-split: addc5b4972ee08997bb9da706df31be1eb9714dd
Merge commit '36b66688b2be4911d62b6d3b2b43e5fcdbff2b82'