Option to constrain supports within print area

[yoshimitsuspeed]

It would be great if whether by default or by option I could choose to have supports only created within the print area. It would be even better if a support was cut off by the border the generation algorythm either shifted the base on organic supports, and or made support areas wider while making them thinner in the direction to keep it inside the print area.

Another thing that would be awesome would be the ability to auto center or arrange a part after supports have been generated. In essence PS calculating how best to position the part including where supports were needed.