Clean up the wireframe example a little

Change-Id: I1ceb32b820541f3a615d76439635bb794f6b0672
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
Change uuid -> id as it really isn't universally unique any longer

Change-Id: If25d1f71dfff62009db1cd4f72a1b0725b4c6d14
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>
Remove defunct empty class

Change-Id: I146f54395fb291dbe7ac1e05ed5a32ac526c8be8
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>