Program – Delay Line Encoding

The edit box class has an issue where sometimes unmodified lines are reported as being changed.  There is currently a check when replacing a program line where if the line has not changed, no action is taken.  Currently the translated RPN list is compared to the stored RPN list for the line.  Eventually however, the RPN lists will not be stored and this line change detection will have to be changed.  More on this later, but this change will be made once the recreator is implemented.

A newly translated line can't be encoded until it has been determined that the line has changed because the process of encoding adds or updates references in the dictionaries.  If the line then hasn't changed, this would need to be undone, which would be unnecessarily complicated.  Therefore, the encoding of the line was delayed until after it is determined that the line changed.  Since this does not affect new line insertions, the line also needs to be encoded for the insert operation.  The line is only encoded in both places if there was no translation error.

[commit b5c9020cc8]