Clamps a candidate panel width to [SURFACE_PANEL_MIN_WIDTH, 70% of the overlay].
When the overlay width is unknown / not yet measurable (<= 0, NaN), only the
minimum is enforced. The upper bound never drops below the minimum (tiny overlays
resolve to the minimum width).
Clamps a candidate panel width to
[SURFACE_PANEL_MIN_WIDTH, 70% of the overlay]. When the overlay width is unknown / not yet measurable (<= 0,NaN), only the minimum is enforced. The upper bound never drops below the minimum (tiny overlays resolve to the minimum width).