Custom control surface

[headquarter8302]

Enhancement Summary

Essentially FL Studio's control surface plugin but in LMMS. This will probably need to wait until LMMS separates GUI from core, so I'm guessing this feature/plugin will be on the low ends of the list

Implementation Details / Mockup

LMMS already has these control elements on its own (knobs, sliders, buttons), so I don't think any new elements are required to be created.

The lingering issue is how the control surface would link to the various control elements in LMMS. We can already automate a lot of the elements in LMMS, but I'm not sure how that's done internally

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[messmerd]

PR #7649 adds control surface support for transport buttons, which would partially address this issue.

While the ability to control knobs, buttons, and sliders using a control surface might be a difficult feature to add, I don't believe it would require the Core/GUI separation. That's just my guess.