claim openpgp4fpr: URI scheme and launch dialog to receive from keyservers

GPG now registers to handle the 'openpgp4fpr:' URI scheme as a way to
direct OpenPGP 4 fingerprints to GPG for it to handle them.  Currently, it
prompts the user to download the key with that fingerprint from the PGP
keyservers.

openpgp4fpr:5E61C8780F86295CE17D86779F0FE587374BBE81

refs #471 closes #1594
add "_format" to any string name that includes a String.format() in it

This marks the string to translators as a format so that they know they
need to leave the funny formatting bits intact.
REBASE into claim openpgp4fpr: URI scheme and launch dialog to receive from keyservers
show Toast status info when working with openpgp4fpr key importing

This is a quick and dirty way to show status info.  This should really show
the imported user's page in the contacts app.

refs #1594 refs #1625 closes #1626