Display GPG Key Info

Instead of displaying the GPG key block, display the GPG key info, e.g.:

```
pub   rsa2048 2022-02-17 [SC] [expires: 2027-02-16]
      1ABD0F4F95D89E15C2F5364D2B523B4FDC488AC7
uid           [ultimate] Roy Keene <rkeene@keeta.com>
```
with a button that says "Copy GPG Public Key"