Ability to shift/swap the number of hotcues

[mixxxbot]

Reported by: Swiftb0y
Date: 2020-05-08T14:57:48Z
Status: Confirmed
Importance: Wishlist
Launchpad Issue: lp1877596
Tags: cue, hackathon

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Some people like to keep their hotcues ordered in the position they occur in the track.
This implies that inserting hotcues before later ones requires all previous/subsequent hotcues to
be shifted manually to free up that slot. Currently, this is a tedious process which clears hotcue colors and labels in the process.

It would be great if Mixxx had the ability to shift and swap hotcues (their number to be exact).

I propose adding new actions to the cuemenupopup:
 * shift-left/-right which moves all previous/subsequent cues by 1.
 * swap with N (N being a field accepting numbers) which swaps the current hotcue with the one specified by N (N could also be an empty hotcue slot; thus just moving the cue there leaving behind and empty slot).
I am not a designer so I'd appreciate if someone came up with a more intuitive way to shift/swap the hotcues.