Use project parameters for calculations

src/components/estimation-range.tsx

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+import ProjectTimeUnit from "./project-time-unit";
+import { defaults, getRoundUpEstimations } from "../models/params";
+
+export interface EstimationRangeProps {
+    project: Project,
+    estimation: Estimation
+    sdFactor: number
+}
+
+export const EstimationRange: FunctionalComponent<EstimationRangeProps> = ({ project, estimation, sdFactor }) => {
+    const roundUp = getRoundUpEstimations(project);
+    const e = roundUp ? Math.ceil(estimation.e) : estimation.e;
+    const sd = roundUp ? Math.ceil(estimation.sd * sdFactor) : (estimation.sd * sdFactor);
+    const max = e+sd;
+    const min = Math.max(e-sd, 0);
+    return (
+        <Fragment>
+            <abbr title={`max: ${max}, min: ${min}`}>{`${e} ± ${sd}`}</abbr>&nbsp;<ProjectTimeUnit project={project} />
+        </Fragment>
+        
+    );
+}
+
+export default EstimationRange;

src/components/project-time-unit.tsx

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+import { FunctionalComponent, h } from "preact";
+import { Project } from "../models/project";
+import { getTimeUnit } from "../models/params";
+
+export interface ProjectTimeUnitProps {
+    project: Project
+}
+
+const ProjectTimeUnit: FunctionalComponent<ProjectTimeUnitProps> = ({ project }) => {
+    const timeUnit = getTimeUnit(project);
+    return (
+       <abbr title={timeUnit.label}>{timeUnit.acronym}</abbr>
+    );
+};
+
+export default ProjectTimeUnit;