Add hint about address picker usage to zip code (PLZ) and city (Stadt/Gemeinde) fields
Closes #497 (closed)
What does this MR do?
Quick fix for #497 (closed) as discussed with @peter.toennies (https://yunity.slack.com/archives/C1T1ZM9A4/p1551008103213400)
How confident are you it won't break things if deployed?
Links to related issues
- 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))