I am on Qubes OS. That means fedora-25 as dom0. I would like to change the configs for "notification area" alias "systray" plugin of xfce. How can I do it. I would like to delete/add one item. The Gui only gives me the option to hide with ugly arrow on the side or to "clear all known applications". However, regarding the last option I am afraid to lose the notification area as it is and never get it back. I looked with the "find" command for "xfce4" and "xfce4-plugins" and so on. All the files I could find, e.g. in ~/.config/xfce4, could not help me. I can nowhere find a config file for the plugin.
Thanks in advance :)