Use QWindow::geometry() for size when sending resize before expose.

Task-number: QTBUG-30996

Change-Id: I9c3589ea67b563f6e588568ee54cc8bbd084f87c
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Windows: Send a geometry change after Window creation.

Task-number: QTBUG-30996

Change-Id: I03b5e1fdbbdd779f86541291c13e9eb6840ff3c6
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>