[Bug]: Vertical scrollbar not fully shown in network request details tab

[cpAdm]

Version

1.56.0

Steps to reproduce

1. Open trace viewer
   e.g. https://trace.playwright.dev/?trace=https://demo.playwright.dev/reports/todomvc/data/e6099cadf79aa753d5500aa9508f9d1dbd87b5ee.zip
2. Open network tab
3. Open some request

Expected behavior

Vertical and horizontal scrollbar are shown when necessary to view full content

Actual behavior

Vertical scrollbar is partially shown
Horizontal scrollbar is never shown, some content is cut of.

Additional context

Originally mentioned in #37610

Environment

System:
  OS: Linux 6.6 Ubuntu 24.04.2 LTS 24.04.2 LTS (Noble Numbat)
  CPU: (12) x64 Intel(R) Core(TM) i5-10505 CPU @ 3.20GHz
  Memory: 10.39 GB / 23.47 GB
  Container: Yes
Binaries:
  Node: 22.15.1 - /usr/bin/node
  Yarn: 1.22.22 - /usr/bin/yarn
  npm: 10.9.2 - /usr/bin/npm
  pnpm: 10.15.0 - /usr/bin/pnpm
npmPackages:
  @playwright/test: ^1.56.0 => 1.56.0