* POC preserve filters and group by when navigating between dashboards
* Save all variables and time range
* minor refactor
* Add feature toggle
* Update feature toggle usage
* Delete local storage item if nothing to preserve
* Structural changes
* Simplify restore params code
* Use session storage
* Add tests
* Merge fix
* Remove unused code
* And make it better, errrrrr
* Minor deduplication refactor
* last minor