In particular, we got feedback that it was surprising to not get to
check which NeoPass you wanted to use, and that the permissions were
never prompted again. I figure let's err on the side of ample clarity!
As part of this, I've added the new `external_link_icon` global helper,
which embeds an SVG from Chakra UI. That's just the convenient place I
know to grab that icon, and I did it this way instead of an `img` tag
because that enables the `currentColor` thing to work instead of coming
out black!