(Multi) touch buttons in qml should not be always automatically released

I am trying to make a virtual keyboard in QML. I'd like that normal keys be automatically released after 1s, as currently done by Qt. But I'd like that my "Shift" key can stay pressed without an automatic release, which does not seem to be the case.
This is true only when pressing with fingers, and there is no automatic release when mouse clicking.
So I suggest adding a boolean property 'automaticTouchRelease', set to true by default.

(By the way, a PressAndHold signal would be of interest too in MultiPointTouchArea, although I reckon a timer would do the trick.)

Thank you very much.