JabRef version 3.4 on Windows 10

When exporting to MS Office 2007 (.xml) the short title information is missing in the generated xml file. As both bib files and MS Word when importing xml files support that information, this should be exported when available.

Steps to reproduce:

1. Input short title in bib file (shorttitle = {...})
2. Export to MS Office 2007 (.xml)
3. Short title is missing in export (no <b:ShortTitle> ... </b:ShortTitle>)