[Stack Monitoring] Alert grouping toggle never renders as "enabled"

[weltenwort]

Kibana version: 7.12.0-BC4

Elasticsearch version: 7.12.0-BC4

Original install method (e.g. download page, yum, from source, etc.): cloud

Describe the bug:

When toggling the display mode of the stack monitoring alerts, the <EuiSwitch /> never renders as enabled:

Steps to reproduce:

1. Navigate to the Stack Monitoring app.
2. Open an alerts popover with active alerts
3. Observe the display mode toggle state at the bottom
4. Click the display mode toggle
5. Observe the display mode toggle state

Expected behavior:

The switch is rendered as enabled in one state and as disabled in the other, or a different UI element is used to represent the state.

[elasticmachine]

Pinging @elastic/stack-monitoring (Team:Monitoring)

[chrisronline]

This is actually by design. Once you click the toggle, it will change to the other group type. Perhaps a EuiSwitch is not the right UI control here.