Chart: add show_legend toggle, document it, and add e2e test
#1544
| Job | Run time |
|---|---|
| 3m 49s | |
| 3m 49s |
show_legend toggle, document it, and add e2e test
#1544
| Job | Run time |
|---|---|
| 3m 49s | |
| 3m 49s |