Fix not working single value field for Autocomplete Deluxe element UI

same for the latest 2.03 version here.

I have removed single widget variant theming and script and made single value field use multiple widget as well.
Also implemented validation for cardinality so now it happens as user adds values and not on form submit which is better from UX standpoint

I have adjusted the patch a bit to allow users to choose whether they want multiple value design for single value fields and also left single value widget styles and scripts. By default the option is disabled to maintain same behaviour for existing fields.

Automatically closed - issue fixed for 2 weeks with no activity.