spacing when windowIsSmall for mobile buttons on channel import

[nucleogenesis]

Summary

Fixes #7113 by adding conditional padding when windowIsSmall

Reviewer guidance

See the issue and then login as super admin and see that it is fixed. Check all screen sizes.

References

#7113

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Contributor Checklist

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

Testing:

• 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

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

[codecov]

Codecov Report

Merging #7219 into release-v0.14.x will decrease coverage by 0.01%.
The diff coverage is 0.00%.

Impacted Files	Coverage Δ
...gins/device/assets/src/views/HeaderWithOptions.vue	0.00% <0.00%> (ø)
kolibri/utils/cli.py	64.24% <0.00%> (-1.35%)	⬇️