[NGRM] - Scrolling is erratic when flattening in sync log viewer

[mirisb]

Scrolling in sync log view behaves erratically (where it should be smoothed) if the wells are flattened according to well pick. This can also be observed in internal Webviz storybook: https://equinor.github.io/webviz-subsurface-components/storybook-static/?path=/story/welllogviewer-demo-synclogviewer--default&args=syncTrackPos:!false;syncContentSelection:!false