Fix contour plot axis to x-y data range, not axis ("tight"). * scripts/plot/private/__contour__.m: Remove axis ("tight"). Set axis range before adding patches so that axis limits aren't re-calculated for each patch. * scripts/plot/meshc.m, scripts/plot/surfc.m: Set xlimmode, ylimmode to manual. scripts/plot/private/__ezplot__.m: Remove FIXME comment and manually setting axis which was workaround for old behavior.