Fix updated settings/config init routine on settings UI.

frontend/src/main.js

@@ -32,23 +32,7 @@ router.afterEach((to) => {
   });
 });
 
-
+function initConfig(app) {
-const v = new Vue({
-  router,
-  store,
-  i18n,
-  render: (h) => h(App),
-
-  data: {
-    isLoaded: false,
-  },
-
-  mounted() {
-    v.isLoaded = true;
-  },
-});
-
-
   // Load server side config and language before mounting the app.
   api.getServerConfig().then((data) => {
     api.getLang(data.lang).then((lang) => {
@@ -63,8 +47,34 @@ api.getServerConfig().then((data) => {
       const t = to.meta.title ? `${i18n.tc(to.meta.title, 0)} /` : '';
       document.title = `${t} listmonk`;
 
-    v.$mount('#app');
+      if (app) {
+        app.$mount('#app');
+      }
     });
   });
 
   api.getSettings();
+}
+
+const v = new Vue({
+  router,
+  store,
+  i18n,
+  render: (h) => h(App),
+
+  data: {
+    isLoaded: false,
+  },
+
+  methods: {
+    loadConfig() {
+      initConfig();
+    },
+  },
+
+  mounted() {
+    v.isLoaded = true;
+  },
+});
+
+initConfig(v);