Clean up v5 sidebar implementation #10131
Merged
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Description (required)
This is a follow-up to #9890 and cleans up some repeated markup to improve performance. The initial prototype included several repeated scripts and extra unnecessary DOM that these changes clear up.
WebPageTest before/after comparison: https://www.webpagetest.org/video/compare.php?tests=241202_BiDcYR_BZH,241202_BiDcVQ_BZN
B-33174502e013fe9e449c4a2ab7a390b892920238.mp4