QDoc: possible error in linking to typedefs

When inspecting the output with the comments-file patch, I came across an issue with autolinking to QFileInfoList. Where previously links pointed to qfileinfo.html#QFileInfoList-typedef, these links aren't generated anymore. I suspect this is possibly because it is a typedef. See e.g. qtxmlpatterns/qtxmlpatterns-filetree-example.html. In qtxmlpatterns/qabstracturiresolver-members.html, the link to QObjectList is removed.

I believe this might require some further investigation.