[Implemented] Edit device credential 'description' field

[jeremyh]

It would be great to be able to edit the 'description' field for a device credential.

We have many stored credentials and descriptions weren't added at the time of their creation, so we were wanting to go through and retroactively apply a description, but weren't able to.

Thanks!

[Tomas]

Just an update for anyone finding this topic - editing Credentials (both description and enabling High-Security Mode) is possible since 2.1.1