AreaChart:With steps, fmt and labels

Build 362 on fix/references-wait-for-their-data
1200px
Reviewing disabled
Baseline History
Build 362bed39b9
Current build. There are unaccepted changes, so build 356 is still the baseline.
Build 356ef3dd43 current baseline
Accepted by Zach Stence.
Build 3525e4f34e
Accepted by Zach Stence.
Build 3385fb8ac4
Accepted by Zach Stence.
Build 308f94e6d4
Accepted by Archie Sarre Wood.
Commenting is disabled because there's a newer build on this branch