Centralize setting MySQL charset
MySQL: Use utf8mb4 if available
Use singular caption
Display explanation of default value
Unlock session in alter database
Change Dump to Export
Add CSS classes to navigation
Make master key unreadable to others (bug #410)
Use utf8mb4 on more places
Fix edit by long non-utf8 string (thanks Robert Vlach)
Use chmod() instead of umask()
Make adminer.key group-readable
Adapt to mapping structure

Mappings return a different structure actually:
http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/mapping-intro.html#_viewing_the_mapping