change behaviour of choice fields

changed key / value behaviour so not aonly values are used
enables choice fields as to_email/from_email/cc_mail/bcc_email
improved behaviour of choice email fields
Check if key SERVER_SOFTWARE exists.
simpler return 

just user return on the newly fixed isChangelogEnabled
'/files' folder is under BOLT_WEB_DIR that is differs BOLT_PROJECT_ROOT_DIR if Bolt is composer installed vendor app
Add ja-JP translation files.
Merge pull request #1330 from n1215/ja-jp-translation

ja-JP translations
Merge pull request #1328 from rixbeck/master

Filemanager folder operations issue
Merge pull request #1325 from CoolGoose/patch-6

simpler return
Merge pull request #1323 from jadwigo/emailchoices

Add Emailchoices to simpleforms
added an extra check for table_catalog to handle slight variations in postgresql
Merge pull request #1332 from rossriley/postgresql-tablecheck

Postgresql Table Check
Merge pull request #1324 from ntomka/patches

Check if key SERVER_SOFTWARE exists.
Merge pull request #1327 from rossriley/file-browse-improvements

Updating file browsing in line with new upload functionality