Fix resource viewing wasted vertical spacing for smaller devices

[LianaHarris360]

Summary

This pr fixes the display of resources on android/smaller device screens that had too much spacing on top.

This pr also updates the import of defaultLanguage from kolibri-design-system/lib/utils/i18n to be imported from kolibri.utils.i18n instead within the file kolibri/plugins/learn/assets/src/views/AssessmentWrapper/index.vue instead to fix the error

Module not found: Error: Can't resolve 'kolibri-design-system/lib/utils/i18n' in '/Users/lianaharris/kolibri/kolibri/plugins/learn/assets/src/views/AssessmentWrapper'

received when running the dev server.

Before:

After:

References

Fixes #11074

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-0.16.0b3.dev0_git.2.g894dd497.pex
Windows Installer (EXE)	kolibri-0.16.0b3.dev0+git.2.g894dd497-unsigned.exe
Debian Package	kolibri_0.16.0b3.dev0+git.2.g894dd497-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.0b3.dev0+git.2.g894dd497-0.3.0.dmg
TAR file	kolibri-0.16.0b3.dev0+git.2.g894dd497.tar.gz
WHL file	kolibri-0.16.0b3.dev0+git.2.g894dd497-py2.py3-none-any.whl

[akolson]

Thanks @LianaHarris360. Code changes make sense and manual testing also checks out!