Ability to select column headers when doing a CSV export of users

Would it be possible to be able to select the columns to be included in the csv export when downloading a list of users from midPoint? At the moment, only the predefined columns for a given collection are used.

Please also make it a selection list of appropriate fields (including extension attributes) for the focustype if possible, rather than having to enter $focus/givenName or something like that.

This would be a great help and be a big step to eliminating the need for reporting