Datadesciption: Let datadescription place units at values

[FlorianFehring]

Datadescription descripes data with colors. But values often have units (e.g. km, mm, cm, ...) Datadescription should be expanded to add the units at the displayed data.

Example code:
function appendUnits(evt) {
let units = JSON.parse(localStorage.getItem("attributeUnits"));
const repeatedSets = evt.detail.repeateds;
repeatedSets.forEach(set => {
for (let i = 0; i < set.children.length; i++) {
const child = set.children[i];
const bpElements = child.querySelectorAll("swac-bp[attrname]");

        bpElements.forEach(bp => {
            const attr = bp.getAttribute("attrname");
            if (units[attr] !== null && units[attr] !== undefined) {
                const span = child.querySelector("span");
                if (span) {
                    span.textContent += " " + units[attr]
                }
            }
        });
    }
});

}

But code should not modify the displayed value itself but have to add the unit after the values bindpoint.