AreaChart:With steps, fmt and labels

Build 333 on dependabot-138
1200px
Reviewing disabled
Baseline History
Build 33348d3ecb
Current build. There are unaccepted changes, so build 308 is still the baseline.
Build 308f94e6d4 current baseline
Accepted by Archie Sarre Wood.
Build 294a891660
Accepted by Adam.
Build 2460c9be73
Accepted by Brian D .
Commenting is disabled because there's a newer build on this branch