fix(stem): improve waveform channel visibility

[acolombier]

This improves customisation of the stem waveform visibility. This feature will allow opacity customisation, as well as bringing the last adjusted stem on foreground for better visibility

This should fix #14870

[Swiftb0y]

couple nits, rest looks sensible

[Swiftb0y]

Code looks very good, but since this involves UX, I'd live to get @ronso0's thoughts too.

[Swiftb0y]

couple more nits

[Swiftb0y]

LGTM. Thank you. /softfix

[Swiftb0y]

/softfix

[acolombier]

Sadly, I broke softfix. I'm just looking at the action in @daschuer's repo - Daniel, would you be open with me capturing this script directly inside the action so it easier to manage? It would go inside a dedicated .github/actions folder so would still be nicely encapsulated.

(FYI, The hardcoded use of GITHUB_TOKEN is the root cause of the problem)

[daschuer]

My idea is to keep it reusable for all our repositories. So the logical move would be cloning it into mixxxdj.
I suggest to clone from upstream rather than from mine. Than I can make mine following mixxxdj.

[acolombier]

After consideration, I've decided to stick with the existing action. I think we might want to move it inside Mixxx org at some point later, but don't have time now.
I took the freedom to push a oneliner to the CI to address this. a fix for my breaking change merged yesterday

[acolombier]

/softfix

[Swiftb0y]

still borked @acolombier ...

[acolombier]

/softfix

[acolombier]

I'm giving up. I consider this GH script too much of a hack and too hard to maintain. Happy to help moving this into the Mixxx repo, and migrate as an organisation action once it gets stabilised, in case you change your mind @daschuer

[acolombier]

Rebased manually now @Swiftb0y

[Swiftb0y]

Thanks.

[JoergAtGithub]

I just tested it, and it works as intended.