Implement password interface that uses Secret Service

[johanwiden]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
The current solutions for password interface requires entering a master password.
By using the default (login) Secret Service, there is no need to repeatedly entering a master password.
Also: Secret Service is available in all (most?) linux desktops, part of the linux distribution.
https://specifications.freedesktop.org/secret-service

Describe the solution you'd like
Add an interface module, using Secret Service, to Password Manager.
This will rely on two Python packages, that often are available in the linux distribution:

• keyring: https://pypi.org/project/keyring
• SecretStorage: https://pypi.org/project/SecretStorage

Describe alternatives you've considered
I am not aware of a secure alternative solution, that does not require repeated entry of master password.

Additional context
Add any other context or screenshots about the feature request here.

[johanwiden]

I have implemented pull request #3083 for this issue.