When decrypting multiple PGP messages, try all of them before quitting.

If I paste a set of consecutive PGP messages in the "decrypt" box, the code only looks at the first one.

Would be nice to attempt to decrypt them all, noting which ones could not be decrypted, and decrypting what it can.

Start by locating the code behind the decrypt box and how it handles a single PGP message. Trace how decryption failures are reported and how multiple consecutive messages are parsed. Done means all pasted messages are attempted, successful messages are decrypted, and failures are noted without stopping the rest.

Written by the indexing model from the issue text.