Click-vs-drag guard: a completed handle gesture only counts as a DRAG (adopt + persist
the resulting width) when the pointer moved at least
SURFACE_PANEL_DRAG_CLICK_TOLERANCEpx horizontally. Non-finite coordinates
(degenerate events) are never a drag.
Click-vs-drag guard: a completed handle gesture only counts as a DRAG (adopt + persist the resulting width) when the pointer moved at least SURFACE_PANEL_DRAG_CLICK_TOLERANCEpx horizontally. Non-finite coordinates (degenerate events) are never a drag.