• fix: slight flicker of contents when picker opens.
• more padding around picker.
• lots of code enhancements, including:
  • bump React Beautiful DnD to v8 from v4.
  • use ResizeObserver to monitor window (scrollHeight) changes, means we can now use one encapsulating Window component, instead of lots WindowHeightUpdater components dotted around the code.
  • bump BlueprintJS to v3 from v2.