Less naive table children separator

Created by: ffoodd

Following #34861, closes #35197 and fixes #35152 (closed).

CodePen:

• Still solving #34861 initial issue: https://codepen.io/ffoodd/pen/zYdvdoe
• Solving #35152 (closed) and #35197: https://codepen.io/ffoodd/pen/wvqKqge