* Scroll selection anchor into view when adding new comment * check if cursor is near viewport edge * Show "add comment" tooltip below cursor if near viewport top GitOrigin-RevId: 0dc2234bc03b1d88a3719ba01a4a865f218b9bfa
show Add comment button on mouse up event GitOrigin-RevId: 2c87f11fab9f9fb7e11637bb9eac2ca1ab9b298b