write empty values to the csv

src/services/exporter.ts

@@ -146,11 +146,6 @@ export class Exporter {
 
   private _writeCsv(stream, series) {
     for(let row of series.values) {
-      const isEmpty = _.every(
-        _.slice(row, 1),
-        val => val === null
-      );
-      if(!isEmpty) {
       let csvRow = {};
       for(let col in series.columns) {
         csvRow[series.columns[col]] = row[col];
@@ -159,7 +154,6 @@ export class Exporter {
       this._task.progress.exportedRowsCount++;
     }
   }
-  }
 
   private _getFilename(extension: string): string {
     return `${this._task.id}.${extension}`;