Extra path to the Notifications modal and Onboarding miniguide

[jaybuidl]

This is expected by some email notifications.

• {{ baseUrl }}/#/#notifications: opens the home page with the settings modal open on the notifications tab
  Example: https://v2.kleros.builders/#/#notifications

• {{ baseUrl }}/#/#onboarding: opens the home page with the onboarding miniguide modal open
  Example: https://v2.kleros.builders/#/#onboarding