typo Isbn -> ISBN

[jonasstein]

JabRef version 3.4

Isbn should be ISBN (https://en.wikipedia.org/wiki/International_Standard_Book_Number)
Doi should be DOI (https://en.wikipedia.org/wiki/Digital_object_identifier)

see screenshot

[koppor]

URL, URI, ISSN are also candidates for other casing. Maybe we should display the fields as we currently write them out: everything in lower case. Would that also be fine with you? isbn, doi, url

[jonasstein]

Why not write it in their correct spelling? I am not in the development team, so I do not have the right to decide about spellings, but to my understanding it would be very logical to write things as they are written. Please correct me, if I miss some obvious point here. Best regards, Jonas

[lenhard]

Implemented and merged with #1589