Certificat reader from reader

[bobbyben]

Is your feature request related to a problem? Please describe.
It would be great to open certificat "view" when I have pem x509 decoded file in clipboard.

Describe the solution you'd like
Instead of loading a "certificate" file on disk, I would like to be able to load it from the clipboard

Describe alternatives you've considered

Additional context
Example of pem cert which can be loaded
-----BEGIN CERTIFICATE-----
MIIGWDCCBECgAwIBAgIUR3allEINIxc7Eff2H9a8oLNr5VgwDQYJKoZIhvcNAQEL
.....
MC+m4G1vsdzltA0HoNEwZnB74g9EwDbDxrJtzCufpxSe8MWaD7oE7WMfaqsNEE+M
at0uFbrOKurwO0gAf5r2HXkfi+F8Ou42h09x2XMeo98OQ8rgiHKK0HIvDrA=
-----END CERTIFICATE-----