Improve wishlist share emails

Oh it looks like when the user is anonymous it already prompts for the name. If the user is logged in it uses "my" instead. That seems silly. At least it could use the username. But I think it's better to have that entry box be there, anon or not, as the username isn't always the person's name or a useful identifier for the recipient.

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After:

Cleaned up the language further

Issue is ready for review. Test failure is from the main branch and not related to these changes.