Visually differentiate paragraph item from plugin summaries in closed mode form

Problem/Motivation

Now when you visit node/ID/edit with collapsed paragraph fields there are some nice paragraphs information in the summaries at each paragraph items.
I was wondering if we should make it visually more clear what is the first line content from the plugin summaries, and maybe truncate the paragraphs item summary content a bit "earlier" preventing the plugin summaries to be hidden because of the long summary string. Something like this:

STR:
- enable paragraphs_collection_demo
- in /admin/structure/types/manage/paragraphed_content_demo/form-display set Paragraphs field "Edit mode" (fields[field_paragraphs_demo][settings_edit_form][settings][edit_mode]) to "Closed"
- visit the paragraphs_collection demo node edit page
- now you can see the summaries for each paragraph items

Proposed resolution

If we agree to shorten the paragraph item content summary and make it "bold" to differentiate it from the plugin summaries:
edit Drupal\paragraphs\Plugin\Field\FieldWidget\ParagraphsWidget::addCollapsedSummary(), mode strip_tags(implode(', ', $summary)) before the plugin summary foreach loop, try to truncate/substr the $summary to the first (let's say) 65 chars and add a "<strong>" markup.

Remaining tasks

Discuss if the proposed feature and solution are fine, evtl. update the IS.

User interface changes

API changes

Data model changes