Fix scrollbar on Lighthouse panel start view
Fix scrollbar on Lighthouse panel start view

Bug: 1337277
Change-Id: I43e81521a2a9fe48b17605e75461ca887689dffa
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3711851
Reviewed-by: Connor Clark <2d5c837a0b2cf015b24acdf5e50262e50d986795@chromium.org>
Commit-Queue: Adam Raine <7e7869e510a2e8e4e90b5749fd5d70443c19f753@chromium.org>

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