NewBadge missing when downloading channel

[thesujai]

Summary

task.channel_id was undefined here
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References

Related to #6730
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Reviewer guidance

It is clear that this addresses the bug due to which #6730 was not being able to reproduced
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Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

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• If this is an important user-facing change, PR or related issue has a 'changelog' label
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Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.16.0b7.dev0_git.3.g2e05b1fd.pex
Windows Installer (EXE)	kolibri-0.16.0b7.dev0+git.3.g2e05b1fd-unsigned.exe
Debian Package	kolibri_0.16.0b7.dev0+git.3.g2e05b1fd-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.0b7.dev0+git.3.g2e05b1fd-0.3.0.dmg
Android Package (APK)	kolibri-0.16.0b7.dev0+git.3.g2e05b1fd-0.1.0-debug.apk
TAR file	kolibri-0.16.0b7.dev0+git.3.g2e05b1fd.tar.gz
WHL file	kolibri-0.16.0b7.dev0+git.3.g2e05b1fd-py2.py3-none-any.whl

[rtibbles]

Nice detective work! This feels like a good fix to go into 0.16, so I'll retarget it. Let me know if you're comfortable rebasing onto the release-v0.16.x branch, or I am happy to do it for you.

[thesujai]

@rtibbles okay you did it anyways! Happy to contribute:)

[rtibbles]

I retargeted the PR, but did not rebase - this would need to be rebased onto release-v0.16.x (rather than currently where it is branched from develop, so has about 231 commits in it that we don't want in the release branch!).

[thesujai]

@rtibbles should be GTG now