Display of namespaced classes in documentation

In KDE some of our API lives in namespaces named after the module.

Consider for example the Menu class from the Purpose module:

namespace Purpose {

/*!
  \class Purpose::Menu
  \inheaderfile Purpose/Menu
  
  Bla bla bla
*/
class Menu {
}
}

The resulting documentation page will look like this

The title does not include the namespace of the class, despite this being important information.

Only the (with the stock CSS somewhat oddly displayed) subtitle has that information.

What I'd expect to see is "Purpose::Class" as title and no subtitle.