Ability to multi-select in a list knob

[MarkOSullivan94]

Description

Currently there's no option to enable multi-select within the list knob and we can only select one option at a time.

I want to be able to select one or more options when deciding which bottom nav bar button components I want to see with an alert dot.

The easiest way I've found to do this so far is to have a boolean knob and check which of these values are true before sending that data to my bottom nav bar widget.

As you can see this bloats the right hand panel and so a multi-select list would condense the amount of required space.

Expected Behavior

It would be great if list knob was improved to allow for multi-select. In doing so, it would return a List of the selected values e.g. I have a list of String value and so the return type would be List<String>.