Right now toSplitInto uses display: false for all tests.

Hi,
JabRef 5.2--2020-12-24--6a2a512
Windows 10 10.0 amd64
Java 14.0.2

When importing a bibTex citation from a publisher, uppercase abbreviations of editors names is often protected with curly braces, like that:
{IEEE} Journal of Quantum Electronics

If the journal abbrevations list contains the unprotected version:
IEEE Journal of Quantum Electronics

Jabref does not recog

In the following diagram, it is not possible to drag Y on to the end of the arrow, despite it being empty.

In such a situation, it makes sense to allow Y to be dragged on top of the empty node.