qdoc: Generated list are sorted based on their declared location

\generatelist and \annotatedlist commands sort the elements using  Node::nodeNameLessThan(). For node types that are not page nodes (they do not generate a page of their own), the sorting function considers the location (i.e, file path of the declaration) over the actual name of the node/element.

This is almost always incorrect as the preferred sort order is alphabetical, and the location is typically not visible in the user-visible docs.