choose-elem-button type filtering

[deer_buster]

I would like to be able to filter available selections to specific type(s) for each button. For instance, I want to limit one choose-elem-button to type={"ammo-turret","artillery-turret"} and ammo-category {"bullet","artillery-shell"} for the other.

[shanemadden]

This would be handy - I'd like to add that it might be nice to be able to send a filter with individual (items/recipes/etc) in addition to setting types as filters.

[deer_buster]

Bumping up this request