Hello,

Thank you for the update. After some more research that property has more to do with if the icon should display in a touch/mobile environment. To enable the feature chooser you have to enable two or more features that would require it such as advanced filtering, multiple sorting, and column moving. Single sorting and basic filtering do not enable the feature chooser because they can be displayed in a way that doesn’t require it.

Thanks for the answer.
I added the option and continued the same way.

Here is a codepen to verify that the addition of the option featureChooserIconDisplay: "always" , doesn't add the icon.

http://codepen.io/anon/pen/gwrPbG 

Thank you