Email notification feedback

Related issue: https://gitlab.e.foundation/e/infra/backlog/-/issues/944

Success notif: email sent

1. For me the main issue is still there for the browser render. The page is empty and we have a split of a short sentence. browser and minutes are in the next line. Maybe it is because we center the text but on my first view it looks weird when I see this render.
2. Footer should be at the bottom of the page in any cases.
3. All rights reserved is splitted. it should be a block and displayed inline.

Success notif: account created

1. Email should be highlighted with something more elegant that double quote.
2. murena.io should be highlighted
3. Add a dot at th end of the sentence ..., please visit this page.
4. Footer should be at the bottom of the page in any cases.