add translate() and translated() methods to QPoint and QPointF for readability, purity and consistency

It would be nice to have translate(int, int), translated(int, int), translate(QPoint), translated(QPoint) methods to QPoint and translate(qreal, qreal), translated(qreal, qreal), translate(QPointF), translated(QPointF) for QPointF.

Why I feel this would be useful:

1) Assume I want to translate point by vector (dx, dy). The only way seems to be to use operator QPoint x(4,3); x += QPoint(dx, dy); Though this works fine, it is not correct from mathematical purity point of view. Adding a point to a point is just two points. Of course QPoint can represent a 2D vector and you can add a vector to a point to get a translated point. Anyway translating by adding two {{QPoint}}s together is not mathematically correct.

2) Another reason is to have consistency between QRect and QPoint. Imagine refactoring of piece of code from QRect to QPoint, e.g. because I am not interested in the QSize component of the geometry element any more. In that case I must rewite all QRect::translate() and QRect::translated() calls to += operators. Could be tedious. For consistency reason it would be nice to have also QPoint::translate(QPoint) and QPoint::translated(QPoint).

3) And the most important reason is readability. Reading translate(dy, dy) or translated(dx, dy) is so obvious to understand what is happening here with the point coordinates. Operator + is not that readable.