VOTE-2822 add checkbox to enable NVRF link

[rayestrada]

Jira ticket

https://cm-jira.usa.gov/browse/VOTE-2822

Description

Added a new checkbox to enable or display the NVRF link from the state page.
I also cleaned up an issue with the button component.

Deployment and testing

Post-deploy steps

1. lando retune

QA/Testing instructions

1. visit http://vote-gov.lndo.site/admin/content/block/3?destination=/admin/content/block and check the new box in the digital form group.
2. visit http://vote-gov.lndo.site/register/washington and make sure the text and link are showing
3. visit http://vote-gov.lndo.site/admin/content/block/3?destination=/admin/content/block and uncheck the new box
4. visit http://vote-gov.lndo.site/register/washington and make sure the text and link are not showing
5. try this in another language

Checklist for the Developer

• A link to the JIRA ticket has been included above.
• No merge conflicts exist with the target branch.
• Automated tests have passed on this PR.
• A reviewer has been designated.
• Deployment and testing steps have been documented above, if applicable.

Checklist for the Peer Reviewers

• The file changes are relevant to the task objective.
• Code is readable and includes appropriate commenting.
• Code standards and best practices are followed.
• QA/Test steps were successfully completed, if applicable.
• Applicable logs are free of errors.