sdk function to set module size and position

[sm_jamieson]

In HH2, an SDK user module does not have any input pins for location and size (left, top, width, height or positionx, positiony, widthpc, heightpc).

In HH3, these pins are now available, so in HH3 a patch can change the modules size and location.

But it would be very useful if the SDK contained a function for the module to change its own location and size. This would enable more visually dynamic user modules.

If it is not thought appropriate for a module to change its own location, just changing its size would still be useful.