Fields containing comma character should be escaped in the file produced by "Download CSV"

[ivankudibal]

Fields containing comma character should be escaped in the file produced by "Download CSV"

1.7.9

Steps to reproduce:
1/ create field in measurement, insert data containing "," in the field
2/ open chronograf, create cell to display tabular data
3/ Use Download CSV and Import the file into Excel (or Libreoffice Calc)

Result:
The tool will parse the line with the field as separator and reads field value as two values. This will break structure of the CSV.

Desired status:
The file exported from Chronograf should correctly escape the comma character (according to CSV specs) that is part of field value.

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See the "SVX,KZN" this is value of the field "Kam":

Same data in Excel, SVX, KZN have been parsed as two fields: