Flipping Animation between Opposite bones without keeping original option

[MrSirSquishy]

Detailed description of your suggestion

Currently, when keyframes are flipped via the "Flip Animation" and have opposite bones, they will flip that animation on the corresponding bone, which is perfectly good and dandy on it's own.

However, when these corresponding bones have different sets of keyframes and are both flipped at the same time, their keyframes end up overlapping, making a big mess.

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This could be fixed by having an option to remove/cut the original keyframes when flipping. It would be a nice qol on it's own, but it would also fix the above problem

Deltarune

[Cubouse]

duplicate of #2326 ?