Fix race condition with nthen

www/common/migrate-user-object.js

@@ -197,7 +197,7 @@ define([
             }, 500);
             progress(0, 0);*/
         }).nThen(function () {
-            cb();
+            setTimeout(cb);
         });
     };
 });

www/common/outer/async-store.js

@@ -1644,6 +1644,7 @@ define([
                 });
                 userObject.migrate(waitFor());
             }).nThen(function (waitFor) {
+                loadMailbox(waitFor);
                 Migrate(proxy, waitFor(), function (version, progress) {
                     postMessage(clientId, 'LOADING_DRIVE', {
                         state: (2 + (version / 10)),
@@ -1661,7 +1662,6 @@ define([
                 loadMessenger();
                 loadCursor();
                 loadOnlyOffice();
-                loadMailbox(waitFor);
                 loadUniversal(Profile, 'profile', waitFor);
                 cleanFriendRequests();
             }).nThen(function () {