Only render read-more link in FAQ synopsis when there is really more to read

Problem/Motivation

The short answers in FAQ aggregations always shows a "Read complete answer" link, even when this Synopsis view mode contains everything.

The reason was that the Smart trim formatter only works with the given field (body) and is unaware of paragraphs added to that node.

Proposed resolution

• Configure the synopsis display to render a label for the paragraphs field
• Rewrite that label in the template to render a link to the node
• For the time being, use CSS to hide any duplicate link (i.e. when body is smart-trimmed and the node contains paragraphs)

Follow-up

This solution might inflict an accessibility flaw, depending on the assistive technology. Lets conduct some tests with the above solution and then decide how to robustly handle redundant links.