Mac window fixes: correct orientation and a ready-made default layout
Fixed the Mac window appearing vertical in the Mac app, and choosing Mac as the device now starts from a finished layout instead of an empty window.
- Orientation: in the Mac app, the Mac window could appear rotated to portrait, and the rotate handle turned only its contents. The window now stays landscape and rotates as a whole.
- Default layout: choosing Mac as the device used to show an empty window. It now applies the Sequoia wallpaper layout with a sample headline, which you can then edit.
- Label: the device option is now named simply Mac.