Fix NeoChat not syncing

This problem was caused because addConnection was starting the sync
proccess unfortunally because the user wasn't connected this aborted
almost immediately and then the sync proccess wouldn't run at all.

Now start the sync proccess after making sure we are connected.

Fix #228

src/controller.cpp

@@ -269,9 +269,9 @@ void Controller::invokeLogin()
             auto accessToken = loadAccessTokenFromKeyChain(account);
 
             auto connection = new Connection(account.homeserver(), this);
-            addConnection(connection);
             connect(connection, &Connection::connected, this, [=] {
                 connection->loadState();
+                addConnection(connection);
                 if (connection->userId() == id) {
                     setActiveConnection(connection);
                     Q_EMIT initiated();