Added modal for successful email action

frontend/src/views/ViewObservations.vue

@@ -18,6 +18,22 @@
         </button>
       </div>
     </b-modal>
+    <b-modal
+      ref="emailCompleteModal"
+      class="text-center"
+      centered
+      hide-header
+      hide-footer
+    >
+      <div class="modal-header">
+        <h3 class="modal-title">Email Sent</h3>
+      </div>
+      <div class="d-block">
+        <br />
+        <p>A CSV of the displayed Observation data has been sent to the configured email address.</p>
+        <button class="btn" @click="$refs.emailCompleteModal.hide()">OK</button>
+      </div>
+    </b-modal>
     <b-row class="pb-2">
       <b-col>
         <b-button-group size="sm">
@@ -381,6 +397,9 @@ export default {
           whom: this.$store.state.search.whom,
           person: this.$store.state.search.person
         })
+        .then(() => {
+          this.$refs.emailCompleteModal.show();
+        })
         .catch(error => {
           this.errorStatus = error.response.status;
           this.errorMessage = error.response.data;