Fixed a bug with /export
Fixed a bug with /export

When a sequence label is present a special unicode character
is used to indicate the label is a sequence label. However
the export routine was not able to successfully encode it.
Now export process ensure the characters are "safe".

Signed-off-by: Tom Marble <b248307e886b80bf9cb4014595572a835b049bf4@info9.net>

tmarble/planviz,dollabs/planviz,dollabs/planviz,tmarble/planviz