Bug fixes

A few improvements

• Improved handler summary
• Allow for Other on email element selection (now supporting tokens)
• Remove most log messages as mailchimp takes care of logging those (avoiding duplicates)
• Detect an empty mail and/or list and log those.
• Add edit handler operation to the logger
• Fix a wrong theme hook warning appearing on the watchdog

Fix small compatibility issue when trying to embed drimages in drimages. (highly custom setup requirement, but possible)

Fixes:
- Fixed wrong match with compound words (term 'befristete anstellung' always matched text containing 'unbefristetete anstellung')
- Fixed missing delimiter for preg_quote
- Issue #3080089 by sepgil: Wrong tagging for terms with 0

-Bug fixes
-UI updates

Remove default batch handling to fix memory usage
Disable admin form for core rebuild
Drush 9 support
Fix missing menu link