Clear usrChosen1.chosen

[Valdacil]

I'm building a configurable to help calculate Kineticist blast burn cost. You'll be able to choose (limited to picks on hero) the blast, form infusion, substance infusion, metamagic, and whether you gather power (move action or round). At the top of the configurable it will show the calculations and total burn cost.

So I have the ability to choose which blast. And I've limited the form infusion picker to only those infusions associated with the selected blast. Now what I need to solve is if you choose a different blast and the select form infusion is no longer valid, I'd like to clear that field. Is this possible?

Also, if there are no valid selections in the form infusion picker, how do I get it to be unselected? I'm guessing I'm going to have to create a dummy form and substance infusion called "No Infusion" and include that in the usrCandid1 so that it is always a valid selection.