IB - how do I get rid of the new titlebar?

I like to shuffle my windows around compulsively and the new title bar is impossible to grab. where is the setting to remove it?

 

Right click on it -> OS Window Bar.

 

Thank you. I'd like to add that in the dark color scheme, the titlebar menu items have been purposely camouflaged. Now they are only slightly lighter than the background. not a user friendly change.