Reduce notification setting change payload

What does this MR do?

Instead of directly updating the DOM with the notifications settings change payload, this MR uses jQuery to perform the UI changes after the payload is received.

Are there points in the code the reviewer needs to double check?

Shouldn't be

Why was this MR needed?

• Improves existing UI
• Reduces the bandwidth usage (4.3kb to 479b) 🎈

What are the relevant issue numbers?

Closes #20979 (moved)
Closes #20980 (moved)

Screenshots (if relevant)

Before:

After:

Before (Payload):

After (Payload):

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together