Summary for each chart series.

This creates a summary box for each chart series.

Fixes #194
Remove logging as per @annapawlicka
Merge pull request #197 from MastodonC/feature/chart-summaries

Summary for each chart series.
Go back on cancel.
Merge pull request #207 from MastodonC/feature/cancel-btn-fix

Go back on cancel.
Fix to rollups

- Add more tests.
- Fix bug in cumulative daily rollups
- Fix bug in daily rollups.