Revert "Issue #3226681 by markie: Warning caused by unlimited_number field #type is 'radios' but #options is NULL (PHP 7.2)"

This reverts commit 3710fe18.

Issue #3226681 by markie: Warning caused by unlimited_number field #type is 'radios' but #options is NULL (PHP 7.2)

This reverts commit 42cdfea2.

Fixes issues with 8.9

Anna Kalata authored Mar 22, 2019 and dpi committed Mar 22, 2019

Issue #3036216 by Weilinggu, akalata: #options as NULL results on PHP 7.2 result in countable errors

Added the ability to customise the raw unlimited value stored in integer fields when unlimited number widget is used.

Minimum and maximum values for unlimited number widget are now determined by field storage, instead of always minimum of one. Default (undefined) is still one.

Includes working field widget.