Windows with a transient parent does not reflect the relationship
in the stacking order. Essentially AboveTransientParent is missing
as a configuration choice.
What makes this slightly convoluted is that the window stack
does not depend on the window (for testability).
We solve this problem by making the stack and treenode templates,
and provide test class as arguments when testing.
QWasmWindow and QWasmScreen are not templated as before.
There is also a new order type StayAboveTransientParent. Which
means that we can no longer use order type to get to the
group location (Since StayAboveTransientParent can map to either
of the three types).
The window stack tests have been updated to handle the
StayAboveTransientParent type.
Finally, we do not do anything with a normal parent
child relationship as this should already work
correctly.
Fixes: QTBUG-131699
Change-Id: Ie08e18f9e0a2339175c4a09da0a831f031df71e1
Reviewed-by: Lorn Potter <lorn.potter@qt.io>
e48c19449e