A "do nothing" option in the midi controller learning tool

[xxxmicrobexxx]

Feature Description

I accidentally assigned an action to a button on my Stanton DJC 4 controller. I wanted to undo it but there doesn't seem to be a way and doing it manually in the .xml file is tricky.

So maybe in the UI it could look like this

[ronso0]

Learned controls have the comment/description
"MIDI-learned from .. messages"
You can sort the mapping table by description and hopefully find the one.

[ronso0]

A "Clear mapping" selector would of course be nice when there are too many MIDI-learned mappings.

[xxxmicrobexxx]

The other thing about editing the mapping table is that not everyone has that expertise and this idea would make things easier. I also suspect it would be easy to implement.

[ronso0]

The issue I have with "Unmap" item is that it I feel its pointless if it's yet another item in the huge controls menu, ie. not really discoverable if you want to quickly undo a mapping.
IMHO a more discoverable "Undo" button would be better, but I don't have good proposal where to put that in the current GUI
Or a "Clear a mapping" button in the Learning dialog

And what about a marker in the mapping table, like "New", so newly added items are visible. This would probably require a new column or other rework of the mapping table model.