Moving remaining references to session getters to the useUser composable

[nathanaelg16]

Summary

This change moves the remaining references to the session vuex module getters to the useUser composable.

References

• Completes Migrate all existing references to session getters and state to the useUser composable #12203
• Followup to Migrating existing references to session getters to use the useUser composable #12438

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

• 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-0.17.0a0.dev0_git.207.g487f6e73.pex
Windows Installer (EXE)	kolibri-0.17.0a0.dev0+git.207.g487f6e73-windows-setup-unsigned.exe
Debian Package	kolibri_0.17.0a0.dev0+git.207.g487f6e73-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.17.0a0.dev0+git.207.g487f6e73.dmg
Android Package (APK)	kolibri-0.17.0a0.dev0+git.207.g487f6e73-0.1.4-debug.apk
TAR file	kolibri-0.17.0a0.dev0+git.207.g487f6e73.tar.gz
WHL file	kolibri-0.17.0a0.dev0+git.207.g487f6e73-py2.py3-none-any.whl

[rtibbles]

All the code changes here make perfect sense to me. Just need to manually test to validate.

[rtibbles]

Ah, looks like merging your useSnackbar PR has given some merge conflicts here! A quick rebase should sort you out.

[nathanaelg16]

Merge conflicts should be resolved now.

[rtibbles]

Thank you, @nathanaelg16!

[rtibbles]

Manual testing spot checks show no issues after the updates. Every reference is properly wrapped in get. This is thoroughly and systematically updated. Great work!