Monitor section missing?

Hi, All,
i compiled Ardour (after Paul’s commit …49464d0391, “change bindings file included in bundles for Linux and OS X”) and I can’t see monitor section. It’s enabled in session properties, click on the Mon button on master bus does nothing. What happened?

I expect lots and lots and lots of minor breakage. You should too.

restore monitor section visibility, broken after the merged with tabbed