My distro is Arch and have the up-to-date plasma 5 installed. How would one change the systray icons of user-installed applications? For example, I downloaded Dropbox from Arch User Repository but the systray icon is pixelated. There are a few AUR packages that allow me to change the systray icons and I looked into their source code to see what these packages doing. It seems they are simply copying png images (the icons) into the `/usr/share/icons/hicolor/*/status` drecitory and then update the icon cache. However, how do we know that Dropbox or other applications in general will know this is the systray icon they will use?

Does anybody know or is there any tutorial or git project that is illuminating? Thanks!