Export: additional column with hours in hh:mm format in addition to decimal representation (Excel/CSV)

When exporting hours to Excel or CSV, the hours are currently only displayed in decimals (e.g. 0.333333 for 20 minutes). This can cause rounding differences. Request: Please add an additional column in the export in which the hours are also shown in the format 00:20 (hours:minutes), in addition to the decimal representation.