Issue #2947739 by Jaypan: Refactoring JS, separating three different integration types into separate scripts, so that they are only loaded if/when they are needed

Issue #2947739 by Jaypan: Ensuring that the nodejs room is changed when the user changes threads. Adding comments to code

Issue #2947739 by Jaypan: Setting private message node js script to work from /thread channel. Still need to integrate a channel per thread

Issue #2947739 by Jaypan: Spun out Nodejs connection URL to configuration, configurable on the private message settings page

Issue #2947762 by Jaypan: New feature: Hide members field private message create page, when recipient set in the URL

Issue #2949093 by Jaypan: Add option for notifications to only be sent if the user is not on the private message page

Issue #2949093 by Jaypan: Add option for notifications to only be sent if the user is not on the private message page