Update the page title to be more meaningful

[chasenlehara]

As a user, I want the page title to be more descriptive, so I can more easily understand what the preview page is when it’s opened and I perceive it in my list of browser tabs/windows.

Currently, “A2J Test Assemble” is the page’s title. If possible, this title should be changed to be more meaningful.

[chasenlehara]

@JessicaFrank @mikemitchel Any thoughts on what the title should include?

[mikemitchel]

I feel like it should include the interview title, plus maybe Document Preview.
For example, Texas Ag Exemption for City Slickers Document Preview

[tobiasnteireho]

pdf is currently name of the interview