"Export All" fails early on classes that no longer exist. #821

During the baselining (and cleanup) process, I ended up with 6 items tracked in @..#Storage@("items") that no longer exists in the environment and does not exist in git.

When Running "Export All", this causes SourceControl.Git.Utils.ExportItem() to return an error status by way of this line of code:

$$$QuitOnError($system.OBJ.ExportUDL(InternalName, filename,"-d/diff"))

which causes the export to end early. When calling this from the source control menu in the SMP, this error status bubbles up to an alert:

I think this should be really clean up broken internal references in the items and TSH nodes within @..#Storage. I don't know if there's any other cleanup worth performing.