Starting in Sonoma, apps can no longer force themselves to the
foreground with -activateIgnoringOtherApps:. winemac currently does
that in a few places - when an app creates its first window, and in
the implementation of APIs like SetFocus.

There's nothing we can do to work around the new behavior in the
general case. This patch makes Wine apps running in the same prefix
yield to one another, so that windows from multiple EXEs can at least
behave as intended.