integrate variables - potential issue when used on slice

Description

with reference to this discussion: [(https://discourse.paraview.org/t/slice-and-avg-air-velocity-the-inlet-result-is-different-from-inlet-settings/15056/7)]

to my understanding the calculated numbers, integrating variables on a slice filter is calculating incorrectly the U_magnitude. all reference can be find in the above thread. By all mean, to sum up the issue, what is showed as u_Magnitude is actually the flow over the section. If I understand correctly the calculation, it seams the filter doesn't devide this value by the area of the slice

Steps to reproduce

create a pipe and set up inlet spec. of velocity or flow, compute, slice the result, integrate, verify calculate integrated U with set up

Configuration

Ubuntu and paraview 5.10-1