Support for downloading query results.

[SloNN]

Sometimes it is useful to get all the results of a query, for example, in the form of a CSV file, so that they can be processed separately, for example, in Excel. To build charts, perform additional filtering.

Currently, it is not possible to download the results, so you have to use the CLI. It would be nice to be able to do this through the UI. As example a separate button that generates a file for download when clicked.