Option to clear opposite side's keyframes with Flip Animation

[Cubouse]

Detailed description of your suggestion

It would be useful to have as an option called

"Clear channels of the opposite sides in selected range before flipping",

or something along those lines, next to "Offset by half the animation length" and "Show modified bones in timeline".

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It would delete the "old" keyframes on the sides that are about to be generated, but only on the channels that have at least 1 keyframe selected, and in the range of the first to last selected keyframe on the timeline.

It would particularly save time when adjusting the timing of keyframes repeatedly.