I use KDE 5 on Fedora 22.
I want to change the panel icon for an application I use (say, okular). I don't care about how the app icon appears elsewhere (e.g. in the menus) - whether that changes or not is fine. Now, I'm not root on this machine. How can I effect this change?
Note: I don't mean the "quick-launch" icon, which you would see when the application is not running, but the icon on each of the running instances' tabs.