use relative paths for controller presets in mixxx.cfg

[RJ Skerry-Ryan]

We store absolute paths to presets in mixxx.cfg:

[ControllerPreset]
Numark_V7 /Users/rjryan/Library/Application Support/Mixxx/controllers/Numark_V7.midi.xml
SCS.3d /Users/rjryan/Library/Application Support/Mixxx/controllers/SCS.3d.midi.xml

If I move my profile directory (e.g. to a thumb drive) these will break! Instead, we should make the paths relative to the profile:

[ControllerPreset]
Numark_V7 controllers/Numark_V7.midi.xml
SCS.3d controllers/SCS.3d.midi.xml

[Jan Holthuis (holthuis-jan)]

How can we distinguish built-in mappings from user mappings then? This won't work with relative paths.

[Be (be.ing)]

I thought about that, but it would be possible to indicate whether a mapping is from the system folder or user folder explicitly without using the absolute file path. Someday I would like Mixxx to be able to run from a USB drive and using absolute paths in the config file like this would be an obstacle.

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/8561