Team list in store view is now collapsed on mobile comment section has more space

What does this MR do?

Team list in store view is now collapsed on mobile as it was with pinboard comments already. There is a "show more" button to expand it. I wonder why including myself nobody came up with this idea earlier.

I also expanded the height of the pinboard comment area.

How confident are you it won't break things if deployed?

Links to related issues

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))