josm loses focus on TAB in relation editor dialog, with dual monitor setup

[dpaleino]

The summary really says it all.
Opening the relation editor, and trying to add more tags / go to the value column hitting TAB, josm loses its focus.

This doesn't happen when adding a tag to an object (i.e. hitting TAB inside the small key/value dialog popping up).

I noticed this after switching to a dual-monitor setup.

(as a side note, the relation editor opens up in the second monitor, instead of staying in the same monitor as josm)

Kindly,
David