[tl] Realtime 2.0.0

Notable changes:

• Support XenForo 2.3.0

Notable changes:

• Support add-on [tl] Post Reply add-on.

Notable changes:​

• Added option to turn off sticky reply form.
• Prevent send notifications many times when using realtime in conversation.

Notable changes:

• Workaround bug when pushing new messages its push editor out of screen.

Notable changes:

• Added new option which allow enable realtime for all threads.

Notable changes:

• Implement logic enable realtime per threads.
• Drop logic enable realtime to all threads which increase cost to pusher.