Missing spacing for small viewport

Hendrik Stender reported an issue

The new card "Admin panel" breaks into a new line for viewports <720px and sticks to the bottom of the previous cards

Reported URL:https://new.typo3.org/community/teams/typo3-development/initiatives/

User Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36