Feature: Make browser notifications customizable & navigable

Hello.

As of today, the notification triggered by the UI through the browser API while the status of an instance changes have, somehow, a fixed timeout (5s if I'm not wrong).

In this ticket I would like to request the following feature(s):

• allow to make the timeout configurable, with the option that if it's 0 then the notification(s) should not be automatically dismissed and it's up to the user to dismiss them
• if possible, open the instance details view of the instance the notification refers to when it gets clicked