Merge branch 'feature/fields-file-input'

Close #182
[#184] Do not save charset for Pgsql adapters

- If the adapter is for postgres, do not save the charset option, either during
  creation or update.
[#184] Do not display charset option for Postgres

- If the driver selected is Postgres, do not display the charset option.
Rebuilt UI distribution
Merge branch 'hotfix/184' into develop

Forward port #184