Add expression to get object group size

[AlexandreSi]

Description

When creating a random object in a group, it would be easier to get the group size to create an object from its name with: "Object" + toString(RandomInRange(1, Group.objectCount()))

Solution suggested

Add a property to the group or an expression to get it.

Alternatives considered

None found

[D8H]

I think something like this should not be exposed, because:

• I doubt it's useful: when users create random objects they will likely do something specific on them so it's better to pick a number and create each object explicitly.
• People will confuse it with SceneInstancesCount(Object)

[Silver-Streak]

I think this could be useful for a lot of scenarios. I've had a situation in the past where I could have used it.

Maybe to avoid confusion you call it something like group.Members() or MemberCount().