Export QStateMachine running property.

It is needed to control a QStateMachine object from QML.

Change-Id: I19271d97718af2d688c477647d6341f70fdef3ea
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Improve docs for QWidget::accessibleName/Description

Change-Id: Ie898c49ed10b9598a0482ecadb18bbadb586d7a9
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Update doc: match actual compact JSON output

Task-number: QTBUG-36682
Change-Id: I0fca746a7838cce49efc243a242bb9bb7119bd9e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Fix crash when inserting the same instance widget more than once

Task-number: QTBUG-39324
Change-Id: Ib1e0e107cd411311344aa5d85c3ca4c34211448b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Set fallback for QFont::System to be MS Sans Serif and not Arial

The system font for Windows should be MS Sans Serif which is what Qt 4 was
using and not Arial.

Change-Id: If3ed55bce87f6376b2897f1fc487bbc0627d1799
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>