xF2 Add-on [BS] Real time chat 1.5.0

.changes:

• Added a new type of server communication with the client. Long polling.
  • This type is a bit slower than web sockets, but the chat will still be in real time.
  • This type does not require additional configuration. You just need to specify the maximum duration of the request.
    • I advise you to set 15-25 seconds.
  • This type loads the server more than web sockets.
  • There is the possibility of developing new adapters for the exchange of information between users (for example, redis or memcache instead of a database)
• Added style properties for some elements
• Updated depencies

You can see how working a new long polling type here: https://demo.devsell.io/
More about long polling: https://www.pubnub.com/blog/http-long-polling/
More about update: https://devsell.io/resources/bs-real-time-chat.11/update/27/

.changes:

• Fixed error Template admin:widget_def_options_real_time_chat is unknown
• Duplicate code moved to getMessageBody function

.changes:

• Adaptation of the deprecated fn method
• User permission group id changed
  • After updating you will need to set all permissions again
• Added PHPDoc to classes
• Now the minimum php version is 7.0.0