JabRef version 5.3--2021-06-27--aa60dd6 on Windows 10

I have tested the latest development version from http://builds.jabref.org/main and the problem persists

The icons in the entry edit window are frequently too dark to be visible in dark mode. A bright color would be better suited

Steps to reproduce the behavior:

1. change to dark mode
2. edit an entry
3. view icons