Start a preview selection after 3 pixels (PR #2336)
Start a preview selection after 3 pixels (PR #2336)

Used the pageX properties of the mousedown and mousemove events
in the comparison to start the preview selection.
Changed the minimum width to start the selection from a sample size
to 3 pixels.

Co-authored-by: Julien Wajsberg <c731ef3723fea1f1e8348cfb0001482845b48dea@gmail.com>

devtools-html/perf.html,mstange/cleopatra,mstange/cleopatra,devtools-html/perf.html