Created attachment 130281 [details] Screenshot SUMMARY If you edit the taskbar panel and remove a widget, a sticky notification is displayed, offering to undo the action. Unfortunately it's placed above the controls to edit the panel. Please see the screenshot. SOFTWARE/OS VERSIONS Operating System: Manjaro Linux KDE Plasma Version: 5.19.3 KDE Frameworks Version: 5.72.0 Qt Version: 5.15.0
Dodging the panel controller in a horizontal panel is easy, but the algorithm that avoids overlap isn't designed to move the popup horizontally which would be the case for a vertical panel. Needs a bit more investigation for that case.
As of git master (soon to become Plasma 6.4) they appear to dodge the ruler properly; closing!