Thanks for your replies and suggestions!
I love KDE, but sometimes is a mess make everything work. So now, that I’m using Qubes for about a month I’m preferring to keep XFCE for better stability. I used to call system tray (systray…tray sorry for abbreviation) the section of the taskbars in Windows or Linux that is used to display the icons of certain programs and notification. I see that here in the panel is called notification area. Sorry if my english lead to a misleading
I don’t want some application launcher in panel, rather I’d like a way to minimize in the notification area some application which I’ve opened, with the purpose to have more space in the panel.
Not all applications include it among the possibilities, I was wondering if there was a little program or an option of qubes to do it.
That’s why I gave the example of kdocker, it meets this need, but I can accept that there is not a counterpart for XFCE, just curious