Usability Typeahead widget: add select button

[arndbeissner]

Enhancement

Typeahead widgets lack a visual clue that they are selection fields. When Typeahead is not used as an input helper for free text (e.g. input helper for mail recipients) but used in validation mode as a selection widget, the user wants a visual clue the field can be clicked. I suggest adding a button - exactly like in the Select widget - for this purpose. That might be configurable or an opinionated behavior (validating=show button, free text=no button).

Package Version: 7.0.3

Code

n/a

Expected behavior:

Show selection button like Select widget when Typeahead is configured as validating (or make it configurable)

Actual behavior:

No selection button is displayed, no visual cue.

[arndbeissner]

FYI: showed the app to the customer for the first time. "why can't I click on the fields to select?" immediately came up. Once they know it, it's not an issue, but as I thought, users are irritated.