fix: Ensure editable form when cloning timeseries which contains observations

The observations are NOT cloned, only the
timeseries values

src/components/ObservationTimeSeries.vue

@@ -449,7 +449,7 @@ export default {
       });
     },
     uneditable() {
-      return this.observations && this.observations.length > 0;
+      return !this.createClone && this.observations && this.observations.length > 0;
     }
   },
   mounted() {