Tools header menu missing visual regression testing link

[jeffpaul]

Describe the bug The homepage properly includes Visual Regression Testing at the end of the Tools section, but the Tools header menu is missing that item.

Steps to Reproduce

1. Click on the Tools header menu
2. See that Visual Regression Testing link is missing.

Expected behavior The same links from the homepage table of contents matches the header menu link structure.

Screenshots n/a

Environment information

• Device: MacBook
• OS: <!-- MacOS 10.14.6 (18G95)
• Browser and version: Firefox 69.0 (64-bit)
• Plugins and version: n/a
• Theme and version: n/a
• Other installed plugin(s) and version(s): n/a

Additional context n/a