Second round of tweaks for datapoints tables.
Second round of tweaks for datapoints tables.

Handles comments left by @iksaif on review #58 after it was committed.

criteo/biggraphite,natbraun/biggraphite,criteo/biggraphite,Thib17/biggraphite,unbrice/biggraphite,Thib17/biggraphite,iksaif/biggraphite,dpanth3r/biggraphite,criteo/biggraphite,Thib17/biggraphite,iksaif/biggraphite,criteo/biggraphite,iksaif/biggraphite,Thib17/biggraphite,iksaif/biggraphite