Implement low- and med-risk alert UI

[mbransn]

Based on scope decisions for initial release (#96), low- and medium-risk alert UI is ready for implementation. Success messaging has been added as well.

• Visual annotation for spacing/sizing/styling can be found here.
• Icons have been added here.

[andrewkrug]

This has been implemented and deployed in production @hmitsch @m-branson @comzeradd @gdestuynder thanks for all the hard work!

[hmitsch]

Congrats! 👍

[mbransn]

Fantastic, thanks @andrewkrug same to you!