List field values in structure preview are not truncated

[foxacid]

Description

Structure field previews are usually truncated to save space. There's a regression in V4 causing list fields not to be truncated anymore. Instead all content is displayed.

Blueprint:

formats:
  type: structure
  fields:
    image: fields/image
    name:
      type: text
    description:
      type: textarea
    features:
      type: list
    platforms:
      type: text
    preview:
      type: url
    details:
      type: pages
      max: 1
      query: site.childrenAndDrafts

[distantnative]

What would be our expected case here: only show the first bullet item and truncate it with ellipsis?

[afbora]

My suggestion is would that merge all bullets with comma (via striping html tags each bullet) and then truncate the string as single line:

- First
- Second
- Third
- Fourth

First, Second, Third, Fo..