Chinese characters cannot be sorted alphabetically by pinyin

[ff5722]

What steps will reproduce the problem?

1. Open a list containing items in Chinese characters, either the suggestions box or tags on objects

What is the expected result?

Tags are shown alphabetically by pinyin as is generally used

What happens instead?

Tags are merely grouped per character but not sorted overall. They don't seem to be sorted by stroke order either (which is another method for sorting Chinese).

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

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-06-02 08:27:29 +0200 (Tue, 02 Jun 2020)
Build-Date:2020-06-02 11:11:35
Revision:16538
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16538 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 1903 (18362)
Memory Usage: 857 MB / 2709 MB (355 MB allocated, but free)
Java version: 1.8.0_251-b08, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ FastDraw (35405)
+ ImportImagePlugin (35248)
+ SimplifyArea (35405)
+ apache-commons (35362)
+ apache-http (35092)
+ buildings_tools (35474)
+ ejml (35313)
+ geotools (35169)
+ importvec (35248)
+ jaxb (35092)
+ jna (35092)
+ jts (35122)
+ log4j (35092)
+ mapwithai (1.5.5)
+ opendata (35405)
+ reverter (35474)
+ terracer (35327)
+ utilsplugin2 (35476)

Tagging presets:
+ E:\Box Sync\Documents\Openstreetmap\JOSM presets\BridgeLayerPreset.xml
+ E:\Box Sync\Documents\Openstreetmap\JOSM presets\CellTower.xml
+ E:\Box Sync\Documents\Openstreetmap\JOSM presets\Reservoir.xml

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/MapWithAI&zip=1

Last errors/warnings:
- W: java.net.SocketTimeoutException: Read timed out. Cause: java.net.SocketTimeoutException: Read timed out
- E: Communication with OSM server failed - null
- W: java.net.SocketTimeoutException: Read timed out. Cause: java.net.SocketTimeoutException: Read timed out
- W: JOSM expected to find primitive [way -119662] in dataset but it is not there. Please report this at https://josm.openstreetmap.de. This is not a critical error, it should be safe to continue in your work.
- E: java.lang.Exception
- W: JOSM expected to find primitive [way -119937] in dataset but it is not there. Please report this at https://josm.openstreetmap.de. This is not a critical error, it should be safe to continue in your work.
- E: java.lang.Exception
- W: JOSM expected to find primitive [way -131116] in dataset but it is not there. Please report this at https://josm.openstreetmap.de. This is not a critical error, it should be safe to continue in your work.
- E: java.lang.Exception
- W: java.net.SocketTimeoutException: Read timed out. Cause: java.net.SocketTimeoutException: Read timed out

[tntchn]

The role of the sort method is usually follow Unicode CJK Unified Ideographs（中日韓統一表意文字） code which follow the radical（部首） and the count of strokes, which used in many places especially in IT field. I think that is not a problem because it' hard to make a dictionary in JOSM about the pinyin of a word and use radical and count of strokes is enough.