First draft of an element which deletes points

Logic/Osm/Changes.ts

@@ -64,6 +64,7 @@ export class Changes implements FeatureSource{
             if (elementTags[change.k] !== change.v) {
                 elementTags[change.k] = change.v;
                 console.log("Applied ", change.k, "=", change.v)
+                // We use 'elementTags.id' here, as we might have retrieved with the id 'node/-1' as new point, but should use the rewritten id
                 this.pending.data.push({elementId: elementTags.id, key: change.k, value: change.v});
             }
         }