KOA-5229 Update Horizontal Navigation

[gert-janvercauteren]

Horizontal Navigation removed:

• Badge
• Notification dot

• Check this if you have read and followed the contributing guidelines

Remember to include the following changes:

• README.md
• Tests
• Screenshotting code
• Adding a component? Remember to expose it in the main Backpack.h header file
• Docs (either update backpack-docs now, or create a follow up ticket)

If you are curious about how we review, please read through the code review guidelines