Support dismissing notifications from the RHS view

[mickmister]

The plugin supports using the RHS to browse unread GitHub notifications, as seen in the screenshot below. When the user navigates to the URL in the notification, GitHub marks the notification as read.

I'm proposing we have a button next to this link that allows the user to dismiss the notification without navigating to the URL. I'm not sure if GitHub's API supports this, but I believe we would just need to send an API request to dismiss that specific notification, and then refresh the view to see the change completed.

[mickmister]

It would be great to be able to unsubscribe from the resource associated with the notification as well

[Kshitij-Katiyar]

Hey @wiggin77, Do you think we should work on this one as this would be a helpful feature?

[Kshitij-Katiyar]

Approved by Eric
CC: @wiggin77