Area series can cover other series which makes it impossible to hover them

[alxnddr]

Describe the bug

Area series can cover other series which makes it impossible to hover them:

We should sort series so that all of them are generally available for hovers

To Reproduce

1. New -> Sample dataset -> Count by Created At: Month and Product → Category
2. Make it a combo chart, make Gadget an area
3. Try hovering underlying bars to see the tooltip

Expected behavior

No response

Logs

No response

Information about your Metabase installation

All versions

Severity

annoying

Additional context

No response