Add Secrets password manager to default Excluded apps.

[MontyQI]

Is your feature request related to a problem? Please describe.
When you copy password or login from Secrets password manager it is added to database of pano.

Describe the solution you'd like
Secrets should be added to excluded apps so passwords aren't stored in database.

Describe alternatives you've considered
None

Additional context
Secrets is only available as flatpak on flathub so the name of the window is "org.gnome.World.Secrets"