AreaChart:With steps, fmt and labels

Build 1206 on 2131-clean-up-stories-to-fully-enable-chromatic
1200px
Reviewing disabled
Baseline History
Build 120653402ea current baseline
Current build. Accepted by Zach Stence.
Build 1203312f3b3
Ancestor build. There were unaccepted changes, so this was not used as a baseline.
Build 996a35ebc4
Accepted by Zach Stence.
Build 927c24f8ad
Accepted by Archie Sarre Wood.
Build 85522c35f6
Accepted by Zach Stence.
Build 852bab0b35
Accepted by Zach Stence.
Commenting is disabled because there's a newer build on this branch