Description

This PR fixes a bug where the last client to connect would not see the host's loading progress bar update on loading screens. To do this, it makes sure that the NetworkedLoadingProgressTrackers are part of the DDOL scene. The PR also includes a small improvement to stop trying to update the loading progress when there is no scene load in progress.

Issue Number(s)

MTT-6302

Contribution checklist

• Tests have been added for boss room and/or utilities pack
• Release notes have been added to the project changelog file and/or package changelog file
• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• JIRA ticket ID is in the PR title or at least one commit message
• Include the ticket ID number within the body message of the PR to create a hyperlink
• An Index entry has been added in readme.md if applicable