QHeaderView does not handle eliding of multiple lines correctly

QHeaderView does not handle eliding of multiple lines correctly. It will take the length of the whole text and compare that to the width of the section even though it has been split across multiple lines. As a result this gives the wrong appearance.

It has been previously indicated that it is not designed to support multiple lines, but there is no reason for this not to be supported going forward at least since the means to do the work does exist.