this post will help you save some time.
icons only on the task manager is a feature that is included by default on KDE.
always check your basics otherwise you’ll end up like me trying to compile it from source code. yeah very embarrassed right now.
unlock your widgets–> go to add widgets —> search for icons
and you’ll get it right there place it as you wish and enjoy.
here’s a shot of what to expect. i like icons better than the standard. it’s good to have choices on your desktop.