feat(schedule): display next run time

web/src/components/ScheduleForm.vue

@@ -39,10 +39,13 @@
       :rules="[v => !!v || $t('Cron required')]"
       required
       :disabled="formSaving"
-      class="mb-4"
       @input="refreshCheckboxes()"
     ></v-text-field>
 
+    <div class="mb-4" style="color: limegreen; font-weight: bold;">
+      Next run {{ nextRunTime | formatDate }}.
+    </div>
+
     <div>
       <v-select
         v-model="timing"
@@ -283,6 +286,12 @@ export default {
     };
   },
 
+  computed: {
+    nextRunTime() {
+      return parser.parseExpression(this.item.cron_format).next();
+    },
+  },
+
   async created() {
     this.templates = (await axios({
       method: 'get',