kxmlgui regression on OS X between 5.32.0 and 5.35.0

[René J. V. Bertin]

David Faure wrote:

> * 78e572dadf - Revert "use transientparent directly" (7 days ago)
> [....]
> * 4690808e65 - use transientparent directly (5 weeks ago)
> 

Thanks, cherry-picking 78e572dadf resolves the issue without any further changes 
required. 

I'll check the proposed Qt change (provided it applies to 5.8.0).

R.