Application modal transients windows

[Paul Warren <pdw ferret lmh ox ac uk>]

The 1.9b draft suggests that we should use the GTK method of application
modal dialog boxes as standard, where WM_TRANSIENT_FOR is set to the root
window, and the dialog is kept above all other windows in this group.  

John Harper has pointed out that this is not inline with the ICCCM, which
demands that WM_TRANSIENT_FOR should only contain the id of another
top-level window, and by the ICCCM definition the root window is not a
top-level window.

So, do we add another hint indicating application modality, and go and try
to persuade the GTK people to change their ways, or do we put up with this
bending of the ICCCM.  

Any opinions?

Paul