[Safari] CMD+< shortcut opens settings page

System: macOS 10.13.1
Safari: 11.0.1 (but is not exclusive to this version)

I am on a german keyboard and `cmd+<` is a macOS system-wide shortcut to switch between windows of the current app. On Chrome and Firefox, this works as expected, but in Safari, Devdocs seems to listen for this shortcut, which opens the settings page.

The shortcut from the document (`strg+,`) also works, so the extra shortcut is not needed and removing it would result in the expected behavior of the browser.