region selection in alphabetical order (#311)

Closes issues0#311

What does this MR do?

sorts the list of regions in a alphabetically order

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

absolutely... or okay... as far as it is possible with that code ^^

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))