[Xon] Live Content 1.2.3

Polls the server for new content, and adds them to the existing list of posts/messages. Updates alert & conversation totals along the way.

This add-on tries to only use a single poller across multiple tabs for the same thread/conversation, and a single poller for grabbing user alerts & conversations counts updates.

Supported content:

• Threads (loads posts)
• Conversations (loads conversation messages)
• User (allows polling for updated alerts & conversations counts from anywhere)

Permissions:

• Per-forum "View live threads"
• Global "View live conversations"
• Global "Live alert/conversation counter updates"