Administration settings tidy

Problem/Motivation

The administration pages of this module are confusing, with the two pages linked by actions instead of the usual tasks. The action on settings to "Add/Edit Service definitions" is not the usual way to.

Proposed resolution

- Remove the actions except "add service definition"
- Add settings and services tasks
- Make the service definition list the default landing point
- Add settings as a url

Remaining tasks

• ✅ File an issue
• ✅ Addition/Change/Update/Fix
• ➖ Testing to ensure no regression
• ➖ Automated unit testing coverage
• ➖ Automated functional testing coverage
• ✅ UX/UI designer responsibilities
• ✅ Readability
• ➖ Accessibility
• ✅ Performance
• ✅ Security
• ➖ Documentation
• ✅ Code review by maintainers
• ➖ Full testing and approval
• ➖ Credit contributors
• ➖ Review with the product owner
• ➖ Release notes snippet
• ❌ Release

User interface changes

• Settings page moved to task link from services page
• Removed actions linking pages
• Added menu tasks to get between pages

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• N/A