Add create action to confirmations for consistency

[djsegal]

Resolves: #546

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I tried to match the create action to be consistent with the rest of the controllers.

I did however leave the show action in case anyone was still using it for legacy purposes

[djsegal]

@booleanbetrayal:

• should i update this or my other PR, Allow backup field authorization for login & password reset #538?
• i get that you're busy with Rails 5 stuff, I just wanted to follow up

[zachfeldman]

Hi there @djsegal ,

In an effort to cleanup this project and prioritize a bit, we're marking pull requests that haven't had any activity in a while with a "close-in-7-days" label. If we don't hear from you in about a week, we'll be closing this pull request. Obviously feel free to re-open it at any time if it's the right time or this was done in error! If you do, please rebase it with the latest master and explain why it's still needed.

We really appreciate your contribution, we're just trying to make this project manageable again to move it forward.

Hope all is well.