Show info about other user as part of connection confirmation dialog

[adamstallard]

To help detect social engineering attacks, the connecting user's lack of sticker from node one should be pointed out as part of the confirmation dialog.

[adamstallard]

Join date, number of connections, and total stars earned are useful to show to the other user when a connection is being made, prior to confirmation.

We might not want to share verification stickers, since this could be abused by apps posing as people and wanting to bypass sponsorships.

Related to this section of the whitepaper

[adamstallard]

Another possibility is to show a few mutual connections (if they exist)