Fix typo in DB version strings (there should be no .sql suffix)
Add workaround for invalid message charset detection by IMAP servers (#1488968)
If version is not provided assume RCMAIL_VERSION (#1488933)
Don't try to print file extension in a warning message if it's not available
Synced localizations with Transifex
Fix plain text spellchecker icorrect highlighting in non-ASCII text (#1488973)
Merge branch 'release-0.9' into rutgers_release-0.9