P: Add PSB as a file format for external editing

Now that LR 9.2 supports importing PSB files, it would be a little more convenient if you could specify PSB as the default format for editing in Photoshop (Preferences > External Editing > Edit In Adobe Photoshop > File Format). 

As it stands now, if you want to save an edited file in PSB format, you must remember to do File > Save As and select Large Document Format.