[Enhancement] Use localStorage instead of sessionStorage for OAuth Token

[giranm]

Summary

The current implementation of PD Live persists the OAuth token to sessionStorage, which is valid for the lifecycle of a browser's tab. The suggested enhancement should use localStorage so that the users session remain active when the browser is restarted, while taking into account of the OAuth token TTL.

Affected Code

pd-live-react/src/util/pdoauth.js

Line 206 in 066c05f

sessionStorage.setItem('pd_access_token', token);