AreaChart:With steps, fmt and labels

Build 729 on feat/dropdown-overhaul
1200px
Reviewing disabled
Baseline History
Build 7290d337c1
Current build. There are unaccepted changes, so build 486 is still the baseline.
Build 486b753158 current baseline
Accepted by Archie Sarre Wood.
Build 36739ac076
Accepted by Zach Stence.
Build 3653fd43b3
Accepted by Zach Stence.
Build 356ef3dd43
Accepted by Zach Stence.
Commenting is disabled because there's a newer build on this branch