2413/ra task page improve

[tomlovesgithub]

What's included?

• Address display issues (overlapping of application id and email, by removing application id and instead linking to application from name field)
• Include blank options for RA applies to and RA allocated dropdowns so that Admins can 'deselect' any options they have chosen
• The total applications number is was not correct - it was displaying equal the number of candidates requiring RAs instead, field now labelled correctly
• Remove the Stages filter
• Add 'Mark all candidates as unactioned' button

Who should test?

✅ Product owner ✅ Developers ✅ UTG

How to test?

Visit an RA report page, and ensure the listed changes are present and the unaction candidates button works as expected.

Risk - how likely is this to impact other areas?

🟢 Low risk

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PREVIEW:DEVELOP can be OFF, DEVELOP or STAGING

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 1c8005e):

https://jac-admin-develop--pr2421-2413-ra-task-page-im-ffdbxafz.web.app

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