Describe the bug

virt-manager doesn't save settings or connections after closure (starts as if it is the first time each time).

Steps To Reproduce

Steps to reproduce the behavior:

1. add virt-manager to the enviroment.systemPackages in your NixOS configuration file, add virtualisation.libvirtd.enable = true; & add libvirtd to the extraGroups in users.users."your user name"
2. rebuild the system configuration (typically nixos rebuild switch)
3. start virt-manager, add connections & change some settings then close it & start it again.

Expected behavior

virt-manager starts the 2nd time with the settings that were changed & with the previously added connections from the first time.

Additional context

I use kde-plasma as a desktop If that has any effect !

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