Fit dialogs to smartphone screens

What does this MR do?

A lot of our dialogs are too big for smartphone screens. This is an attempt to fix some of these which I found while working on the site.

Changes

• profile:
  • verfication history
  • pass History
  • report user
• store:
  • slot join
  • slot leave
  • manually add teammembers
  • change automatic pickup times

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

Only tested it on my devices. Some testing on beta with different handsets would be nice just to be sure.

Links to related issues

Maybe?

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))