* Make @rx.memo work with state vars passed as props
Seems like this was a regression from the StatefulComponent refactor, because
trying to pass a state Var to a CustomComponent gave undefined, likely due to
`_get_vars` not accounting for `self.props` in CustomComponents.
With this change, it works.
Integration test added to `test_var_operations.py`
* Allow CustomComponent props to be Component
Avoid calling `.json()` on all Base types because the Var serializer already
does that, but this way, more specific types (like Component) can be serialized
differently.
When the type is Component, attach a VarData with the imports and hooks to when
the Var is rendered, it also carries the correct imports/hooks and does not
throw frontend errors.
* test_client_storage: remove race conditions for cookie assignment
Poll for default timeout for cookies to appear in the controlled browser.
* Remove use of deprecated get_token and get_sid in core
Both reflex.app and reflex.state were still using deprecated methods, which
were throwing unsolvable warnings for end users.
* Remove deprecated router functions from integration tests
Mostly removing custom "token" var and replacing with
router.session.client_token.
Also replacing `get_query_params` and `get_current_page` usage as well.
* fix upload tests
Cannot pass substate as main app state, since it blocks us from accessing
"inherited vars"
* state: do NOT reset `router` to default
When calling `.reset` to reset state vars, do NOT reset the router data, as
that could mess up internal event processing.
