Add option to enable different statistics in the chart menu

[orion160]

Prerequisites

• [X] I am using the latest version of Locust
• [X] I am suggesting a new feature, not asking a question

Description

On the chart menu the only possible statistics for requests are p95 and p99.

[andrewbaldwin44]

Hey @orion160, have you seen PERCENTILES_TO_CHART in https://docs.locust.io/en/stable/configuration.html?

You can change which percentiles you would like to see in your locustfile like so:

import locust.stats
locust.stats.PERCENTILES_TO_CHART = [0.5, 0.6, 0.7]