API Explore Website for Application Insights has Incorrect Form

In https://dev.applicationinsights.io/apiexplorer The "Segment" form field accepts only one input for "GET /metrics".

However, according to the documentation (and the API's behavior) in https://dev.applicationinsights.io/reference for the segment query parameter, it is type "array (csv)":

> The name of the dimension to segment the metric values by. This dimension must be applicable to the metric you are retrieving. To segment by more than one dimension at a time, separate them with a comma (,). In this case, the metric data will be segmented in the order the dimensions are listed in the parameter.

As for behavior, if I manually edit the curl to be the following it seems to accept multiple dimensions as expected:

```
curl "https://api.applicationinsights.io/v1/apps/DEMO_APP/metrics/requests/count?timespan=PT12H&interval=PT1H&aggregation=sum&segment=request%2Fsource,request%2Fname" -H "x-api-key: DEMO_KEY"
```

Start at the API Explorer URL and the GET /metrics definition in the linked reference; trace how the segment query parameter is rendered in the form. Done means the form accepts multiple comma-separated dimensions and generates a request matching the documented API behavior and example curl request.

Written by the indexing model from the issue text.