Preview the file content when importing CSV file
When importing data from a CSV file, Redmine asks you to set import options. But sometimes you may not know the appropriate value for options such as field separator, field wrapper, and date format because the content of the CSV file is not shown there.
Although you can check them by opening the file locally, I think it is convenient if the content of the CSV file is shown on the screen. You will be able to know the proper value for the options.