fix(bs4): Make exactMatches ListGroupItems links

[MonkeyDo]

Problem

As reported in the forums the possible duplicate entities are not clickable anymore.

introduced in the Bootstrap v4 migration: 30518ca

Solution

Simply adding the action boolean prop turns the list group item into an anchor tag.
From react-bootstrap docs:

Toggle the action prop to create actionable list group items, with disabled, hover and active styles. List item actions will render a or (depending on the presence of an href) by default

This component is the only ListGroup.Item that has an href and that we use as a link.

Areas of Impact

src/client/entity-editor/name-section/name-section.js

[LordSputnik]

Simple - looks good to me!