How it should look: You open a window Right click on this window button on the panel Tick "Pin to Windows-bar" Close the window And you can still run it from a panel, clicking on the title of window
Unfortunately this is impossible with libwnck (which we're currently relying on for the tasklist/"Window Buttons" plugin). We'd have to use bamf to be able to do what you're requesting, which itself requires an extra daemon to run just to track open windows and their respective .desktop files.