Make `ImageList.clone` internal?

[lars-reimann]

Is there a need to have a public clone method in ImageList? Since all operations return new instances anyway, it seems to be a red herring for users. Might be better to make this internal.

@Marsmaennchen221

[lars-reimann]

🎉 This issue has been resolved in version 0.24.0 🎉

The release is available on:

• v0.24.0
• GitHub release

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