pdf export exporterFieldCallback

[bjaraujo]

in exporterFieldCallback I add spaces to the input to produce identation but it doesn't appear in the pdf.

    exporterFieldCallback: function(grid, row, col, input) {
      var value = "      " + input;

      return value;
    },

[mportuga]

That is because we are trimming data before exporting it. We need to decide how to handle this.