No download buttons in app context

[rtibbles]

Summary

• Backports Replaced isEmbeddedWebView with isAppContext #11715 to release-v0.16.x
• Ensures that we reliably hide UI buttons that initiate downloads in all app contexts

Reviewer guidance

Run the app devserver using the standard guidance
Navigate to a resource
Open the browse metadata side panel
Ensure that no download button appears

QA Guidance:
Run the Android App
Import a single resource
Navigate to resource in Learn
Open the browse metadata side panel
Ensure that no download button appears

---

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

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

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-0.16.0b10.dev0_git.139.gc6fe4e3c.pex
Windows Installer (EXE)	kolibri-0.16.0b10.dev0+git.139.gc6fe4e3c-unsigned.exe
Debian Package	kolibri_0.16.0b10.dev0+git.139.gc6fe4e3c-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.0b10.dev0+git.139.gc6fe4e3c-0.3.0.dmg
Android Package (APK)	kolibri-0.16.0b10.dev0+git.139.gc6fe4e3c-0.1.0-debug.apk
TAR file	kolibri-0.16.0b10.dev0+git.139.gc6fe4e3c.tar.gz
WHL file	kolibri-0.16.0b10.dev0+git.139.gc6fe4e3c-py2.py3-none-any.whl

[pcenov]

I confirm that the download option is removed in the app.

[radinamatic]

Manual QA passed, good to go! 👍🏽 💯

[rtibbles]

Docs build fixed on release.