Some internal component peer work.
Renamed Rectangle::transformed to Rectangle::transformedBy, in order to match the method name in Point, and allow easier use of these classes in templates.
Fixed some toolbar customiser drag+drop problems.
Added a new AffineTransform::scaled method and improved Rectangle::operator*=
Work towards supporting a global scaling factor: Desktop::setGlobalScaleFactor().
Added method OwnedArray::clearQuick