* Unify tooltip options across visualizations
* Update tests
* use addTooltipOptions in piechart
Co-authored-by: Oscar Kilhed <oscar.kilhed@grafana.com>
* First iteration
* Dev dash
* Re-use StackingMode type
* Fix ts and api issues
* Stacking work resurected
* Fix overrides
* Correct values in tooltip and updated test dashboard
* Update dev dashboard
* Apply correct bands for stacking
* Merge fix
* Update snapshot
* Revert go.sum
* Handle null values correctyl and make filleBelowTo and stacking mutual exclusive
* Snapshots update
* Graph->Time series stacking migration
* Review comments
* Indicate overrides in StandardEditorContext
* Change stacking UI editor, migrate stacking to object option
* Small refactor, fix for hiding series and dev dashboard
