Store the access_token in the localStorage

[ChengYanJin]

Component: Dex, ui

Why this is needed:
After login, if we open another tab in the same browser, we are redirected to the login page again.

What should be done:

The hint is to change the user data into localStorage instead of sessionStorage, which is the current case for redux-oidc library. (But we still need to investigate if this is the real issue)

const userManagerSettings = {
...,
userStore: new WebStorageStateStore({ store: localStorage})
}

According to the suggestion of the redux-oidc git, we will need to look at the oidc-client documentation when configuring the userManager.

oidc-client documentation
https://github.com/IdentityModel/oidc-client-js/wiki#configuration

userStore: (default: session storage): Storage object used to persist User for currently authenticated user. E.g. userStore: new WebStorageStateStore({ store: window.localStorage })

Implementation proposal (strongly recommended):
TBD

Test plan:
TBD