Bug Fixes
- Addon-contexts: Fix 'cannot read property h of undefined' in preact (#9001)
- Addon-viewports: Fix missing TypeScript types (#8848)
- Addon-A11y: Show errors, reset config properly (#8779)
- UI: Store layout state in sessionStorage (#8786)
- UI: Fix MobileLayout component error on master (#8941)
- Addon-analytics: Fix 'path is required in .pageview()' (#8468)