alexeymin added a comment.
I can confirm the issue that tray icons are tooooo small on 4k display REPOSITORY R120 Plasma Workspace REVISION DETAIL https://phabricator.kde.org/D23350 To: xshram, ngraham Cc: alexeymin, ngraham, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart