* Add new form styles to dashboard picker

* Use Forms.Select for TimeZonePicker

* Use new form elements for DashboardPicker

* Grafana UI: Extract types from SelectBase, add utils.ts

* Grafana UI: Fix imports

* Grafana UI: Add support for value of type number

* Grafana UI: tweak value search function

* Grafana UI: Add tests for findSelectedValue

* Grafana UI: Add tests for cleanValue

* Grafana UI: Remove redundant check

* Grafana UI: Order imports

* Grafana-UI: Fix TimeZonePicker.story.tsx

* Grafana-UI: Fix timezone value

* Fix merge

* Grafana-UI: Use Cascader vs Forms.Select for TimeZonePicker

* Grafana-UI: Add default size props