Are there samples of custom choosers in the GP Widget?

TimDine

I'm working on a GP widget which I'd hoped would be out of the box.  One of the input parameters is a list of layer names which the user picks multiple options.  Out of the box the WAB has an input method in simpleeditor.js that makes a bunch of checkboxes.  The checkboxes aren't necessarily a problem, but they're not very organized.  In desktop they're in a box with a scroll bar with one checkbox per line.  That isn't the case in the WAB.  I'm looking for someone who has found a good way to tidy this up or a suggestion