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Override comparison operator to consider read/displayed certificates

Description

Override comparison operator to consider read/displayed certificates

If retrieving one certificate from the card fails when the card
certificates are learned then the properties of Card stay the same, so
that ReaderStatus considered the card unchanged. This is fixed by also
comparing the properties of NetKeyCard.

(cherry picked from commit aada28cae58b9307ac7cfd0cf34253e97d526b78)