Make onSettle Async Again

www/common/cryptpad-common.js

@@ -66,11 +66,15 @@ define([
     };
 
     var whenRealtimeSyncs = common.whenRealtimeSyncs = function (realtime, cb) {
-        // FIXME realtime.onSettle should handle this but it doesn't seem to
+        realtime.sync();
+        window.setTimeout(function () {
             if (realtime.getAuthDoc() === realtime.getUserDoc()) {
                 return void cb();
             }
-        realtime.onSettle(cb);
+            realtime.onSettle(function () {
+                cb();
+            });
+        }, 0);
     };
 
     var getWebsocketURL = common.getWebsocketURL = function () {