JabRef does not quit after saving changes.

[CaptainDaVinci]

JabRef unknown
Linux 4.14.79-1-lts amd64
Java 1.8.0_192 on Arch Linux.

• I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

Steps to reproduce the behavior:

1. Make changes in an entry
2. Quit JabRef
3. Select Save Changes in the confirmation dialogue

• Expected Behavior: Close application after saving changes.
• Current Behavior: Application does not quit after saving changes.