In the release notes, the walkaround bypass binding is first described thus:
It is, of course, actually just QUICK PREFLIGHT, as described further down (much, much further down):
But the erroneous version is the one you’ll come across first and once you enter TOOLS into the search bar when seeking to bind this control you’re doomed not to find it - at least until a stray brain cell prompts you to clear the search bar and just type in PREFLIGHT.
Ask me how I know. 