This month is all about visualizing data:
- Add functionality to plot JSON data
- Add chart panel, containing multiple plots (bottom panel)
- Chart panel and settings will be restored on restart
- Charts can be paused
- Panels can be hidden/overlap others completely
- Plot range can be customized
- Plot interpolation can be customized
- Migrated public broker from iot.eclipse.org to mqtt.eclipse.org
- Fix unrounded time intervals in the message history
- Fix weird plot curve interpolations