support a large top margin on bmd_paper_ballot

[kshen0]

Overview

#3872

• Adds an optional 1.75in margin to the BMD ballot component so the top of the ballot isn't cut off when presenting the ballot for validation
• Changes the implementation of the print state
  • The old implementation triggered the scan state too early. When printing longer ballots, the paper would advance such that paperInOutput would return true in the middle of a print, causing the paper to be pulled into the scanner before printing was done.

Demo Video or Screenshot

Before

After

Testing Plan

• Added test to BMD ballot component

Checklist

• I have added logging where appropriate to any new user actions, system updates such as file reads or storage writes, or errors introduced.

• I have added a screenshot and/or video to this PR to demo the change
• I have added the "user_facing_change" label to this PR to automate an announcement in #machine-product-updates

[jonahkagan]

Any reason to use a class here vs just passing a prop to the Header styled component? (that's the pattern I usually see in our code for parameterized styling)

[kshen0]

Didn't know about conditional styling with the styled-components lib!

[jonahkagan]

You could do assert(event.type === 'VOTER_INITIATED_PRINT') to make this a bit more concise. Our assert function will hint the type checker

[kshen0]

723c854

[kshen0]

Not sure if this is the right way to fallback, but I explicitly don't want to overwrite margin with 0 in the case where largeTopMargin is falsy.

[jonahkagan]

If it works, then seems fine to me!

[kshen0]

nb. pollPaperStatus() is still needed here to inform the top-level handler for jammed.