chore: refactor ThematicDialog to functional component [DHIS2-18209]

[BRaimbault]

Implements DHIS2-18209

Description

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Quality checklist

Add N/A to items that are not applicable.

• [ ] Dashboard tested
• [ ] Cypress and/or Jest tests added/updated
• [ ] Docs added
• [ ] d2-ci dependencies replaced (analytics or maps-gl link https://github.com/dhis2/[lib]/pull/XXX)
• [ ] Tester approved (name)

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ToDos

• [ ] todo

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Known issues

• [ ] issue

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Screenshots

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[dhis2-bot]

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