[Mod Request] slider for concurrent jobs in a work bill

[sparr]

If you have one bill to make jackets at your tailor bench then only one colonist can have a jacket in progress at a time. While they sleep with an unfinished jacket sitting on/near the tailor's bench, no other colonist can start making a jacket. You can circumvent this by creating a second bill to make jackets, identical to the first, thus allowing two in-progress jackets at any given time.

I'd love to have a mod that just adds a slider/input to the bill creation/edit window, so that I can specify how many distinct works in progress should be allowed for the bill in question. It might be implemented with a lot of new logic behind the scenes, or it could just create the new bills and maybe make them invisible to the player.