feat(observation): Add cancel button

src/components/Observation.vue

@@ -157,11 +157,18 @@
                            onclick="document.getElementById('infoModal').style.display = 'block';"/>
       </div>
 
-      <div v-if="observation.deleted"></div>
-      <div v-else class="float-end">
-        <a v-show="isDeleteBttnVisible" class="vips-btn danger"
-           v-on:click="callForRemoveObservation">{{ $t("delete.label") }}</a>
-        <a class="vips-btn" v-on:click="saveObservation">{{ $t("save.label") }}</a>
+      <div v-if="!observation.deleted" class="float-end">
+
+        <a v-if="isDeleteBttnVisible" class="vips-btn danger" @click="callForRemoveObservation">{{ $t("delete.label") }}</a>
+        <span v-else>
+          <router-link v-if="backToTimeSeries"
+                       :to="{name:'ObservationTimeSeriesList', params: {expandedId:this.paramObservationTimeSeries.observationTimeSeriesId}}"
+                       class="vips-btn danger">
+            {{ $t("cancel.label") }}
+          </router-link>
+          <router-link v-else class="vips-btn danger" to="/">{{ $t("cancel.label") }}</router-link>
+        </span>
+        <a class="vips-btn" @click="saveObservation">{{ $t("save.label") }}</a>
       </div>
     </div>