Ability to change multi-value separator in Excel reports

[alanorth]

For some fields that naturally contain commas, it would be nice to be able to change the multi-value separator in Excel reports. The author field for example is not easy to use because of the commas occurring in the values themselves:

Al-Najdawi, Moayad, Al-Rowad, Mohammed, Orth, Alan S., Mahmoud, Abdullah, Foqha, Abdullah, Rahahleh, Yosef

Instead, it would be nice if we could set the separator for a field. A semi-colon would be good here:

Al-Najdawi, Moayad; Al-Rowad, Mohammed; Orth, Alan S.; Mahmoud, Abdullah; Foqha, Abdullah; Rahahleh, Yosef