Reduce the spacing of list items for Content Editor

What does this MR do?

Reduces the spacing between sub-items in lists in content editor

Issue: #335970 (closed)

Screenshots or Screencasts (strongly suggested)

Before	After

How to setup and validate locally (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• I have included changelog trailers, or none are needed. (Does this MR need a changelog?)