* Refactor: Replaces initLock with state machine
* Refactor: removes some states for now
* Refactor: adds loading state in OptionsPicker
* Refactor: major refactor of load state
* Refactor: fixes updating graph in parallell
* Refactor: moves error handling to updateOptions
* Refactor: fixes the last cases
* Tests: disables variable e2e again
* Chore: removes nova config
* Refactor: small changes when going through the code again
* Refactor: fixes typings
* Refactor: changes after PR comments
* Refactor: split up onTimeRangeUpdated and fixed some error handling
* Tests: removes unused func
* Tests: fixes typing
* Templating: Moves global variables from TemplateSrv to Redux
* Refactor: renamed to meta
* Tests: fixed broken tests
* Chore: reduces strict null errors
* renamed meta variabel to system variable.
Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>
