correct accoount editing for incremental updates

src/lib/local-storage.js

@@ -9,13 +9,13 @@ export default class LocalStorageUtil {
 
   // Get stored object.
   static getObject(key) {
-    let value = localStorage.getItem(key);
+    const value = localStorage.getItem(key);
     return value && JSON.parse(value);
   }
 
   // Partially or wholly update stored object.
   static updateObject(key, value) {
-    let oldVal = this.getObject(key);
+    const oldVal = this.getObject(key);
     this.setObject(key, Object.assign(oldVal || {}, value));
   }
 

src/views/tinode-web.jsx

@@ -751,7 +751,14 @@ class TinodeWeb extends React.Component {
 
   handleUpdateAccountRequest(password, pub, defacs) {
     if (pub || defacs) {
-      this.tinode.getMeTopic().setMeta({desc: {public: pub, defacs: defacs}}).catch((err) => {
+      const params = {};
+      if (pub) {
+        params.public = pub;
+      }
+      if (defacs) {
+        params.defacs = defacs;
+      }
+      this.tinode.getMeTopic().setMeta({desc: params}).catch((err) => {
         this.handleError(err.message, 'err');
       });
     }