message: change getCellQuestion function,
diff: @@ -3032,10 +3032,10 @@ export class QuestionMatrixDropdownModelBase
  columnName: string,
  rowValue: any
  ): any {
  - var self = this;
  - var getQuestion = function(colName: any) {
  - for (var i = 0; i < self.columns.length; i++) {
  - if (self.columns[i].name === colName) {
  + var getQuestion = (colName: any) => {
  + for (var i = 0; i < row.cells.length; i++) {
  + var col = row.cells[i].column;
  + if (!!col && col.name === colName) {
  return row.cells[i].question;
  }
  }
  