Autoresize Tags/Memberships table to fit content?

[bagage]

What steps will reproduce the problem?

1. Select a node/way that has a long value for any key (let's say for "source" attribute)

What is the expected result?

You can see list of keys/values.

What happens instead?

You can see all keys easily but longer values are not visible even if there is a lot of space available. Because the table splits width 50%/50% between the 2 columns.

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

It would be awesome if the table could be automatically resized so that the first column (keys)'s width matched the biggest one, leaving all remaining width for values which may (usually) be bigger than keys anyway.

Build-Date:2017-04-10 14:26:00
Revision:11883
Is-Local-Build:true

Identification: JOSM/1.5 (11883 SVN en) Linux Debian GNU/Linux 9.0 (stretch)
Memory Usage: 983 MB / 1760 MB (372 MB allocated, but free)
Java version: 1.8.0_121-8u121-b13-4-b13, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-8-jre:amd64-8u121-b13-4
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-13
Program arguments: [--language=en, ${HOME}/majcadastre/CL322-SAINT-PANTALEON-LES-VIGNES/CL322-SAINT-PANTALEON-LES-VIGNES-houses-prediction_segmente.osm, ${HOME}/majcadastre/CL322-SAINT-PANTALEON-LES-VIGNES/CL322-SAINT-PANTALEON-LES-VIGNES-houses-simplifie.osm]
Dataset consistency test: No problems found

Plugins:
+ OpeningHoursEditor (33185)
+ PicLayer (33148)
+ buildings_tools (33004)
+ conflation (0.5.3)
+ jts (32699)
+ rex (26)
+ todo (30000)
+ utilsplugin2 (33212)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.todo.TodoDialog$SelectAction@49a746c2
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.todo.TodoDialog$AddAction@7c630f15
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.todo.TodoDialog$PassAction@261cc5f4
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.todo.TodoDialog$MarkAction@6fbf9f8e
- W: Old style SideButton usage for action org.openstreetmap.josm.plugins.todo.TodoDialog$MarkSelectedAction@21039601

[bagage]

screenshot of the issue