* Replace `CurrentUserStore` with `useCurrentUser` in `ConfigurationsPage`.
* Remove no longer needed mocks in tests.
* Removing not needed import.
* Remove usage of `CurrentUserContext` in `EditEventDefinitionPage` and `ViewEventDefinitionPage`.
* Replace usage of `CurrentUserStore` in `InputsPage`.
* Replace usage of `CurrentUserStore` in `StreamEditPage`.
* Replace usage of `CurrentUserStore` in `StreamsPage`.
* Migrating component to TS.
* Fixing linter hints.
* Improving test
* Fixing `StreamEditPage`.
* Using hooks for `StreamEditPage` where possible.
* Create const for default user in tests.
