Update approver CSS

What does this MR do and why?

Describe in detail what your merge request does and why.

Update approver CSS

• add max width to toggle
• break out strings to update CSS

Screenshots or screen recordings

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action_-_a

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Upload a GitLab Ultimate license
2. Enable the scan_result_role_action feature flag: echo "Feature.enable(:scan_result_role_action)" | rails c
3. Navigate to http://gdk.test:3443/groups/flightjs/-/security/policies/new?type=scan_result_policy

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #382148 (closed)