Chart: add show_legend toggle, document it, and add e2e test
#1545
| Job | Run time |
|---|---|
| 1m 42s | |
| 1m 42s |
show_legend toggle, document it, and add e2e test
#1545
| Job | Run time |
|---|---|
| 1m 42s | |
| 1m 42s |