Add button to create CollisionShape/Polygon in Node Configuration Warning window

[tischenkob]

Describe the project you are working on

Generic platformer

Describe the problem or limitation you are having in your project

When I add a node that requires a collision shape, there is a warning which, when pressed, says that I should consider adding a CollisionShape or CollisionPolygon without providing a quick way to do so.

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

Add two buttons that allow to instantly add CollisionShape and CollisionPolygon child nodes

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

Beside "OK" there would be buttons "Add CollisionShape" and "Add CollisionPolygon"

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

It can be worked around by manually adding a child node in a few more steps

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

I believe, there is no reason not to add this to core since it will increase productivity and provide a slightly more new-user-friendly and convenient piece of functionality

[Calinou]

Duplicate of #2519.