Web>List: Turning "Extended view" on makes rows grow
When turning "Extended view" on in list view will change the height of the individual data rows. Thus the icon that you just clicked to turn Extended view on is shifted downwards and more space is consumed on the screen.
My idea would be to leave the row height as it was before. An padding:2px around the div.typo3-DBctrl caused the grown.
Solution is to remove this padding. :)
See attached screenshots before and after the patch
(issue imported from #M14559)