fix(insights): truncated charts in firefox

[abhi12299]

Fixes #24868

fix.mov

Note: the height property that is removed in this PR has no effect visual side effects on the .StepLegend contrary to the comment in the same file.

[abhi12299]

how do i view the artifacts uploaded by the Visual regression tests workflow? It seems to be failing but I don't have access to the uploaded artifacts i think.

[Twixes]

Interesting, the 1px hack was necessary a couple years ago, but now .StepLegend's height: 100% does seem to work without it. Let's get this in. Thanks!

[posthog-bot]

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[posthog-bot]

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week. If you want to permanentely keep it open, use the waiting label.