3.0.x | custom combo field

Problem/Motivation

as is original d7 settings to early d8 config isn't flexible enough. convert concept to a combo field widget and formatter.

Steps to reproduce

see 2.x releases. (:

Proposed resolution

see 3.0.x branch

Remaining tasks

todo:
-refactor color concept. other old aspects are removed expect for color/preview at this time
- add setup for 'custom block with active skill fields' to replace original base lever tooling.

User interface changes

lots.

API changes

lots.

Data model changes

now used field type, widget and formatter.