Add support for returnUrl to the webapp

[mkleszcz]

Description

Currently when someone is trying to access application page without being logged in (like invitation from the email message) the app will redirect user to the login page. After successful login, user is always redirected to the home screen.

Describe the solution you'd like

App should save the url which not logged in user is trying to access in returnUrl GET param and after login/sign up should redirect user to this page.
Also before redirect to login page the app should display a toast that page that user is trying to access require login.

Describe alternatives you've considered

No response

Additional context

No response

Validations

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