Packman: Item order in the navigation bar needs update

Steps to reproduce:

1. Open or create a project
2. Go to "Window" ->"Package Manager"
3. Observe the new navigation bar

Expected result: "My Assets" should be moved up, above the "Unity Registry" and space before the "Services" should be removed.

Actual result: Items are displayed in the wrong order and not needed spaces are visible. Added screenshot in the "Attachments" section.

Reproducible with:  2023.2.0a2, 2023.2.0a23

Not reproducible with: 2023.1.4f1, 2022.3.4f1, 2021.3.28f1  as these streams have old UI.

Additional info:

• Work task -> [Internal link]
• Design -> Figma