Allow for open collisionpolygon2d in segments mode

[SubtleUnrest]

Describe the project you are working on

A 2d side-view game.

Describe the problem or limitation you are having in your project

I would like to use a collisionpolygon2d in segment mode instead of 30+ collisionshape2ds in some cases.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

allow a collisionpolygon2d to be drawn in the editor without closing the vertices, it helps because i can click around the screen once per rectangle instead of 8+ times

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

This field is nonsense.

If this enhancement will not be used often, can it be worked around with a few lines of script?

absolutely not.

Is there a reason why this should be core and not an add-on in the asset library?

doesn't apply.

[Calinou]

• Related to Using Shape2D or similar in LightOccluder2D instead of a PackedVector2DArray #12932.

Moving to discussion, as there is no concrete technical implementation provided.