[Studio] Preserve Topic table pagination

[Aias00]

Summary

• control the Topic table pagination state so detail modal updates do not reset the current page
• reset the Topic table to the first page only when filters change
• add a regression test for keeping page 2 visible after opening and closing Topic details

Fixes #161.

Validation

• npm test -- --run src/pages/instance/__tests__/TopicPage.test.tsx
• npm test (164 tests, 37 files passed)
• npm run lint (0 errors, 4 existing fast-refresh warnings)
• npm run build
• npx tsc -b --pretty false
• git diff --cached --check

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[Aias00]

Superseded by #638. Folded into the consolidated page data loading/state PR to keep Topic pagination state with related page-level data loading behavior.