Instead of making the changes inline within the data grid online, you can alternatively make the changes to the Excel Spreadsheet (or Google Sheet) and save the changes as a CSV file and use that file to replace the data in the grid. 

Once you have the replacement CSV ready, just click “Replace Data” button at the top of the data grid when in Edit (WIP) mode of the Data File, and upload the CSV file. Once you see the data you uploaded, Save.