Clear the WA_QuitOnClose flag from EvalMessageBox.

The evaluation message box caused  the QtWebProcess
to quit due to the fact that the process has no other
windows and EvalMessageBox was both set to be closed
on quit and ended up being the last window in the process.

Change-Id: Iad6461d014258fdc5fade7dafe48da33903377bb
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Fix compilation with QT_NO_ACCESSIBILITY.

Task-number: QTBUG-27860

Change-Id: I561b0b0b1a098556f9de909241b448307a271985
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
(cherry picked from commit 8b29c7539d87a387854cf06782a7b078dce63612)
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Update changes log for 5.0.2

Change-Id: I01321d4d2074a04e48e90580a4ec38f0af2f23c6
Reviewed-by: Akseli Salovaara <akseli.salovaara@digia.com>
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>