Reimplement visualizations as web components

[alancleary]

This is a catch-all for everything involved in reimplementing the GCV visualizations as web components:

High priority:

Medium priority:

Low priority:

• [ ] #394 medium
• [ ] #395 difficult
• [ ] #389 easy
• [ ] #390 easy
• [ ] #391 difficult
• [ ] #392 difficult
• [ ] #208 medium
• [ ] #84 difficult
• [ ] #43 medium
• [ ] #197 medium