Redesign alert/error message component for confirmations

[rachelcope]

As a user, I want a clear system of alerts on confirmations, so that I can easily prevent mistakes and recover from errors.

Requirements / use cases:

• Always visible (above the fold)
• Single or multiple alerts
• Different urgency levels
• Dismissable
• With and without CTA

Figma

[rachelcope]

Updated designs here