Add menu selection to the vertical navigation next

[panch1739]

Prerequisites

• I have read the Contributing Guidelines.
• I have not leaked any internal/restricted information like screenshots, videos, code snippets, links etc.

Feature request

As discussed, In the collapsed state, the vertical navigation next should still provide full access to navigation. When Interacting with the current selected item, the navigation menu opens, allowing users to change the current selection. Screenshot for reference:

Prototype here.

Specs here.

Use case

No response

[panch1739]

@spike-rabbit @mistrykaran91