Allow upgrading requests in blueprint

[AdamK]

TL;DR
Allow upgrading requests in blueprint (to change quality of requested items)
What?
Currently we can use upgrade planners to upgrade entities in blueprints. But we can't update requests in chests. If we upgrade any turret that gets ammo from the chest that way, if we want tu change the quality of requested ammo, there is no way to do that other than redoing the blueprint.
Why?
I'd like to be able to easily upgrade blueprint chests requests.

To consider:
Agility to upgrade recipes in entities might be a good idea.