Simplify AIS template

[MarkDaoust]

This is about the simplest I can make it. The many ways that AIS may send a file are the source of some of the complexity. A "no-files" version could simplify things a lot.

We loose three things if we do that:

1. There's no "chat" (but we could split chat to it's own template).
2. It's harder for users to tell what went wrong if something breaks.
3. I removed the "show the conversation" code.
   • It's nice that it lets the user see what they're sending.
   • But it is long/complex.

WDYT?

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[MarkDaoust]

I think this is ready to submit.