P: LrC should begin syncing PSB files to the cloud

PSB is an increasingly important file format for complex edits, large prints, 100 megapixel cameras, or other work where the file size may exceed the 4GB limit of TIFs. While likely do not need PSB for many edits, setting it as the default format is ideal so that your work never runs into the limit (which gets messy/complicated when you need to re-save/sync a new PSB and delete the old TIF).

When you have a PSB in LrC, it will not sync to the cloud - even if it is a rather small file (ie similar to TIFs which work great). And there is no error in LrC, it will just fail to sync your file without letting you know it failed.

Expected result:

• PSB sync support should be at least as good as TIF.
• If there are technical limits for certain images (ie file size or pixel dimensions), an error message should show in the "sync activity" summary in LrC prefs so that you understand the nature of the issue. Ideally, there should be a warning on the image in the grid view.