When connecting a ComboBox to an AudioParameterChoice, set the parameter’s choices list automatically to the ComboBox.
This is in 95% what the user wants. If they want to have a different list, they can clear and set their own options, which is in line with the behaviour of SliderAttachment’s behaviour of the textToValue lambdas.
Also switch a button to toggle mode when connected with a ButtonAttachment, because with toggle off the attachment makes little sense either…
Ready to eat wrapped in a little PR: