... by using valueBypassingBindings() when accessing the properties
from the setters.
This commit is mostly trivial.
Had to change the template parameters in the unit-test, because the
updated QTestPrivate::testReadWritePropertyBasics() creates an instance
of the TestedClass, and QAbstractProxyModel cannot be instantiated,
since it has pure virtual methods.
Task-number: QTBUG-116346
Pick-to: 6.6 6.5
Change-Id: I0cae29263ea9bb92c9de06891b0ba8633fb9fd72
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
6a873778b9