Use the new 3-operand testAndSet functions in QMutex

This allows us to get the current value of the QMutex / QBasicMutex
after the testAndSet operation failed. It saves an extra load from
memory.

Change-Id: I4922a8b3df15e342b177b13f56cf4f1184314520
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
QPagedPaintDevice - Move QPageLayout methods

The new QPageLayout methods weren't originally added to QPagePaintDevice
as no new virtuals can be added, instead static polymorphism was used to
add the methods directly in the derived classes QPdfWriter and QPrinter.

This however means that classes like QTextDocument with print() methods
that take a QPagedPaintDevice are unable to access the QPageLayout
methods. To fix this, instead make the QPagedPaintDevicePrivate a
virtual class and have QPdfWriter and QPrinter implement derived
private classes that are called by the non-virtual QPagedPaintDevice
base methods.

Change-Id: Ieb6e513b1fa05f5ae76ea1f9156b0b1a053089eb
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
QPrintDialog - Add Direct print to manual test

Enable printing without dialog.

Change-Id: I1058361febc7ddd8a5e0471e4365969e2f8becfe
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Accessibility text updates for QTextEdit

For Mac this makes QTextEdit work nicely with VoiceOver.

Task-number: QTBUG-37204

Change-Id: I1326d24ca6a932ad667ee395f62881b6ec64e892
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>
Mac Accessibility: Make more widgets name/description work

Change-Id: I0abe17a59f95818939d6b82500d2463c3f135989
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>