Call Detail Reports, Minutes not default duration on page 2,3,...

I think this is a minor bug:

When viewing the CDR, by clicking on the reports tab, Minutes is the default duration.

If next is hit, to go to page 2, the duration defaults to seconds. It should remain minutes.

If search is hit first, and then next is hit to go to page 2, the duration remains as minutes. This should be the case if search is not hit first as well.