Refactoring: do the count calculation outside the site plugin.
Added support for different PH! subsites and the mobile friendly version for the 'urls' push message format.
Replaced manual console calls with the errorHandling class.
Don't send message counts with the URL format.
New default behavior: notify on new messages in favorited threads only. Added configuration option for reverting to all watched threads.
Filter outgoing notifications by URL - the URL remains the same until the user reads the thread, leading to duplicate notifications without this.
Implemented selective sending. Available devices are logged on startup.
Added Hungarian quick-start guide by @sanchomuzax