apps: add route to list sites for operators

the main backup listing route is only available for admins

dashboard/src/components/app/Backups.vue

@@ -276,7 +276,7 @@ async function refreshBackupList() {
 onMounted(async () => {
   autoBackupsEnabled.value = props.app.enableBackup;
 
-  const [error, result] = await backupSitesModel.list();
+  const [error, result] = await appsModel.listBackupSites(props.app.id);
   if (error) return console.error(error);
 
   backupSites.value = result;

dashboard/src/components/app/Location.vue

@@ -261,6 +261,7 @@ onMounted(async () => {
     <br/>
     <Checkbox v-if="needsOverwriteDns" v-model="overwriteDns" :label="$t('app.location.dnsoverwrite')"/>
 
+    <br/>
     <Button @click="onSubmit()" :loading="busy" :disabled="busy || (app.error && app.error.details.installationState !== ISTATES.PENDING_LOCATION_CHANGE) || app.taskId || !formValid">{{ $t('app.location.saveAction') }}</Button>
   </div>
 </template>