Fix content for none of the above option when adding and editing routes

[lfdebrux]

What problem does this pull request solve?

While working on multiple branches, we noticed that the existing routing implementation is missing content for the situation when the answer value for a condition is the none of the above option for an optional selection question; the pages rendered the answer value as none_of_the_above.

This PR adds the missing content.

Screenshots

Showing a route

Deleting a route

Adding a secondary skip to a route

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• Do the end to end tests need updating before these changes will pass?
• Has all relevant documentation been updated?

[github-actions]

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[hannahkc]

Content looks grand - thank so much for doing this!

[SamJamCul]

Great to get this stuff cleaned up