* Fixed issue with multi value.
* Made some refactorings after feedback from Torkel and Hugo.
* minor refactorings.
* changed so we don't make the current value to array if multi is false.
* added snapshot to contain v23.
* Fixed so we always use the correct type when setting value for multi/non-multi.
* added some more tests.
* added tests.
* some small adjustments after feedback
* Refactor: moves all the newVariables part to features/variables directory
* Feature: adds datasource type
* Tests: adds reducer tests
* Tests: covers data source actions with tests
* Chore: reduces strict null errors
