fix: fix horizontal scrolling in navigator

[kof]

Description

Navigator will get horizontal scrollbars when necessary.

Steps for reproduction

1. click button
2. expect xyz

Code Review

• hi @kof, I need you to do
  • conceptual review (architecture, feature-correctness)
  • detailed review (read every line)
  • test it on preview

Before requesting a review

• made a self-review
• added inline comments where things may be not obvious (the "why", not "what")

Before merging

• tested locally and on preview environment (preview dev login: 0000)
• updated test cases document
• added tests
• if any new env variables are added, added them to .env file

[johnsicili]

Scrolling via dragging is broken.

Click and hold navigator item
Drag to the upper or lower bounds
See no scroll occur

[kof]

Its not broken, we intentionally disabled it because this has led to missclicks in the tight space, also because the scrollbar is very narrow, its almost never that you would want to drag it