Feature Request: QPolarChart starting position, direction selection

Currently, polar chart starting point is fixed to 12 o'clock position. It would be nice to have a way of setting it to different positions and being able to switch direction from clockwise to counter-clockwise too.

According to Qt’s documentation “If the angular distance between two consecutive points in a series is more than 180 degrees, any direct line connecting the two points becomes meaningless, and will not be drawn. Instead, a line will be drawn to and from the centre of the chart”. It would be better to make this behaviour configurable like if a user wants this line to be drawn.