I see that the Nicklist themes all use PNG. As almost all icon themes are SVG, and many people (such as myself) use HiDPI monitors with scaling, supporting SVGs would be great. It would eliminate a little pixelation that is visible.
Covered already by "scalable assets" in the referenced bug report, so closing as duplicate. Patch providing SVG-based theme support currently up as https://invent.kde.org/network/konversation/-/merge_requests/8 *** This bug has been marked as a duplicate of bug 341364 ***