Bug Report: Horizontal scrollbar invoked on hover model by long series names

Bug Description

Bug description

Long series names invoke a horizontal scrollbar on the Click to view people modal displayed when overing over the graph, but the horizontal scrollbar cannot be used because the modal is dismissed when the mouse cursor moves toward the scrollbar.

Repro steps:

1. Create a new insight
2. Add two graph series
3. Rename both series with relatively long names
4. Enable Compare to previous period
5. Hover over the charts
6. Note the horizontal scrollbar at the bottom of the modal, and try to use it

https://eu.posthog.com/project/2161/insights/new

Additional context

From: https://posthoghelp.zendesk.com/agent/tickets/15033 (moved to PostHog: https://us.posthog.com/project/2/support/tickets/17620)

Debug info

Session: https://us.posthog.com/project/sTMFPsFhdP1Ssg/replay/019050f1-4d20-770c-898f-f17a0a05baf5?t=1116 
Admin: http://go/adminOrgEU/0186099a-625a-0000-d96d-c58b13e58985 (Project: 2161)
Sentry: http://go/sentryEU/2161

Reproduce the issue by creating an insight with two graph series, giving them long names, enabling “Compare to previous period,” and hovering over the charts. Start by tracing the “Click to view people” hover modal and its dismissal behavior, then verify that the scrollbar remains usable when the cursor moves toward it. Done means long series names no longer prevent horizontal scrolling.