tghtml-common: Go over pb template to check @facs support [was #12283]
Our HTML stylesheet adaptions redefine the template for in order to let them appear in a subtler way. However, the original template is quite complex nowadays, and it allows to do something with @facs, which is used in some projects.
We should re-check the implementation to see whether we can get our intended effect without breaking the complex stuff the original template does.