Fix requests status styling

What does this MR do?

Changes the styling of the status of a request to be more like the proposal in invision.

• Remove 5 different divs with repeated classes, move to a single use of ngClass instead.
• Change color of status to be green when accepted, red when failed or canceled, gray when potential or active.
• Change the font size of the original request and all the replies.
• Change color, size and padding of bar to the left.
• Change color of message depending on whether it is from registrar or user.
• Move status message to the top right of the card.

Before:

After:

Related issues and links

Fix #45 (closed)
Invision screen: https://projects.invisionapp.com/d/main#/console/14789607/317731258/inspect

Developer Checklist

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