report number of cells/faces capped by limitVelocity

cf. EP1841

Also report relative (%) of cells/faces affected.

assigned to @mark

Thanks for picking it up as an issue @mark.

• Aligned output more with limitTemperature
• the percent of faces is taken relative to the number of boundary faces that do not fix velocity themselves.
• the percent of cells is taken relative to the selection size, which may not be the entire mesh.

limitVelocity limitU Limited 56855 (9.06%) of cells, 3702 (9.37%) of faces, with max limit 0.5

mentioned in commit 55f287cd

closed

Thanks @mark for the implementation.