[Warnings/Errors] Design and accessibility improvements

[meissadia]

Close #568

Changes

• [Accessibility] Fix labelling issue in DSR Table/Pagination
  • Dependent upon fix: [Table] Pagination input label's 'for' property needs to align with the input id design-system-react#356
• Upload a new file now a secondary button (should be a link but I couldn't get the styling overrides to play nice with one another)
• Update primary button label: Download Report (CSV)
• Remove green header border on Filing pages

Screenshots

Change	Screenshot
Button label (Warnings)
Button label (Errors)
Remove green header border on filing
Accessibility for pagination: input's for label aligns with table id

[billhimmelsbach]

Hey @meissadia, when you run this with ANDI, do you still see errors with the label?

[billhimmelsbach]

If you end up needing it @meissadia, here's a PR with the latest DSR that can be merged into your branch:
#632

[meissadia]

If you end up needing it @meissadia, here's a PR with the latest DSR that can be merged into your branch: #632

@billhimmelsbach Many thanks for this! Don't know why I couldn't get the dependency to update...

[billhimmelsbach]

Looks great! Thanks for continuing to update this one!