Per-object draft shield options

[wavexx]

Version

version_2.4.0-alpha0-1079-g0e0c52ade (master as of today)

Behavior

In the newest iteration of the brim/skirt/draft-shield options, we now set per-object brim settings, which is great.
The ability to use the skirt as a draft-shield has now been split into a dedicated option: "Draft shield".

While a per-object skirt is not useful (a single skirt for the plate is fine), having a draft shield enabled only on some objects though is something that can help quite often [*].

It looks like the skirt settings do still apply to the draft shield, so to be exhaustive, it's worth mentioning that at least "skirt height", "skirt distance" and "loops" should also be allowed to be changed on a per-object basis in order to make sense, since these would apply to the draft shield which is being customized.

When the draft shield is enabled, the current master version disables the skirt. This makes sense if you have only one object with a single draft shield. However it won't make sense if a draft shield is enabled on a single part.

[*] I've been using high skirts with 2 perimeters also as an ooze shield in TPU or ABS prints with long travels, where some ooze can be unavoidable. Is such cases, controlling all the parameters of the shield is required (TPU will self-collapse easily, and adhere instantly if not separated enough). I'm mentioning this since this shield feature can be quite handy in several cases, and I often combine it with a brim depending on the material.

Is this a new feature request?
Yes

[rtyr]

Similar to #2455.