Icons in settings sidebar are too small on macOS

[selfishseahorse@…]

The icons in the settings sidebar are way too small - It's impossible to get what they represent.

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

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-10-29 19:52:48 +0100 (Sun, 29 Oct 2017)
Build-Date:2017-10-29 19:11:19
Revision:13053
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13053 en_GB) Mac OS X 10.12.6
OS Build number: Mac OS X 10.12.6 (16G1036)
Memory Usage: 349 MB / 910 MB (152 MB allocated, but free)
Java version: 1.8.0_151-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: Display 69677504 1280x800
Maximum Screen Size: 1280x800
VM arguments: [-Djava.library.path=/Applications/JOSM.app/Contents/MacOS, -DLibraryDirectory=${HOME}/Library, -DDocumentsDirectory=${HOME}/Documents, -DApplicationSupportDirectory=${HOME}/Library/Application Support, -DCachesDirectory=${HOME}/Library/Caches, -DSandboxEnabled=false, -Dapple.laf.useScreenMenuBar=true, -Dcom.apple.macos.use-file-dialog-packages=true, -Dcom.apple.macos.useScreenMenuBar=true, -Dcom.apple.mrj.application.apple.menu.about.name=JOSM, -Dcom.apple.smallTabs=true]

Plugins:
+ reverter (33572)
+ undelete (33480)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.