FileMaker, Inc. has released FileMaker Pro 12.0v3 and FileMaker Pro 12.0v3 Advanced. This update addresses issues regarding layout design and rendering, printing, plug-ins, scripting, container fields, portals, and more.
This is off canvas menu widget area. To enable it add some widgets into Appearance – Widgets – Menu Section, and go to Customizer – Main menu to set the icon position.