Missed some special cases where special characters were escaped only if the first character of the value was a comma. To make sure the import/export are always consistent we need to always set delimited parsing disabled AND set the list delimiter to the NUL character.

Fixed possible ConfigurationException on startup if the configuration.properties file had not been created yet.

Exporting the configuration map sorts the keys but saving it does not. Now saving the configuration map will also sort the keys.
Issue: MIRTH-3542