... to replace the old stateChanged(int) one, which a) had the wrong
name and b) the wrong argument type.
Mark the old one as \obsolete, so new users don't see it
anymore. Prepare for deprecation in the test, but don't actually
deprecate, yet (this author does not know how to deprecate signals).
Found in API-review.
Amends 37b47ebf94.
As a drive-by, replace explicit qWait() calls with QTRY_COMPARE().
[ChangeLog][QtWidgets][QCheckBox] Added new
checkStateChanged(Qt::CheckState) signal, obsoleting
stateChanged(int).
Fixes: QTBUG-104688
Change-Id: I01791fd003b752c47d99bea65151202be9175c21
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>