Before Persistent Window

Since last commit, all I've done is make the intermediate tables
invisible/private.
Ooops

Undid all the changes for Ian...but now the tracking works again...
Coords fixed

And tracking still works
Graph appearance, Special checkbox

Lot_ID and PCM_spec are now GROUPING variables by default, no major grid
lines.  Special analysis checkbox in place.  All working.
Fast Startup

All Params now reads from limits file rather than data file, so don't
need to extract unique values