Move login and registration to login

To make this work `AccountManager` is split off from controller taking all the code around `AccountRegister` and is added to LibNeoChat as it makes sense to have this functionality there.

src/libneochat/neochatconnection.cpp

@@ -165,7 +165,7 @@ void NeoChatConnection::refreshBadgeNotificationCount()
 
     if (count != m_badgeNotificationCount) {
         m_badgeNotificationCount = count;
-        Q_EMIT badgeNotificationCountChanged(this, m_badgeNotificationCount);
+        Q_EMIT badgeNotificationCountChanged(m_badgeNotificationCount);
     }
 }