Relation Editor: Display more (useful) information in window title

[skyper]

What steps will reproduce the problem?

1. Have a relation with name and ref and for sure type=*
2. Open relation editor and take a look at the dialog's title.

What is the expected result?

A descriptive title

What happens instead?

The relation's id in title together with the name of the layer but no name, type or ref of the relation

Please provide any additional information below. Attach a screenshot if possible.

Similar to relation list panel more information would be nice as the object id does not help much. Maybe the name template for relations could be used here, too.

I am in ExpertMode with all settings for displaying objects' id and similar enabled.

Mmh, I did not notice the NPEs on statup and my log was meanwhile overwritten. Have to watch the next time. I only noticed the missing content of the StartupPage.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-04-20 23:52:31 +0200 (Tue, 20 Apr 2021)
Revision:17809
Build-Date:2021-04-21 01:30:57
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (17809 en) Linux Debian GNU/Linux 10 (buster)
Java version: 11.0.9.1+1-post-Debian-1deb10u2, Debian, OpenJDK 64-Bit Server VM
Look and Feel: com.formdev.flatlaf.FlatDarkLaf
Desktop environment: GNOME

Last errors/warnings:
- 06561.908 E: java.lang.NullPointerException
- 06563.743 E: java.lang.NullPointerException
- 06575.989 E: java.lang.NullPointerException
- 06608.224 E: java.lang.NullPointerException
- 07208.872 E: java.lang.NullPointerException
- 08026.348 E: java.lang.NullPointerException
- 08028.241 E: java.lang.NullPointerException
- 08028.363 E: java.lang.NullPointerException
- 08075.476 E: java.lang.NullPointerException
- 08077.202 E: java.lang.NullPointerException