Removed “data_original” global variable. Added global variable “FC_to_IF_data”.  This data frame is used when an FC/CFC dataset is opened.  The FC/CFC dataset converted to an IF/FT data frame, which is then held in FC_to_IF_data.  This is done so that conversions to IF and FT data need only be done when a FC/CFC dataset is opened, and not on the fly.
Removed “data_original” global variable.
Added global variable “FC_to_IF_data”.  This data frame is used when an
FC/CFC dataset is opened.  The FC/CFC dataset converted to an IF/FT
data frame, which is then held in FC_to_IF_data.  This is done so that
conversions to IF and FT data need only be done when a FC/CFC dataset
is opened, and not on the fly.

LanceFiondella/srt.core,LanceFiondella/srt.core,arhik/srt.core,LanceFiondella/srt.core,arhik/srt.core,arhik/srt.core,LanceFiondella/srt.core,LanceFiondella/srt.core,LanceFiondella/srt.core,arhik/srt.core