Improve vulnerability report's mobile layout

Paul Gascou-Vaillancourtrequested to merge
361945-vuln-report-improve-mobile-layout into master

This improves the vulnerability report's mobile layout by moving the action buttons below the header.

Before After
Desktop Screen_Shot_2022-05-10_at_10.27.44_AM Screen_Shot_2022-05-10_at_10.26.22_AM
Mobile Screen_Shot_2022-05-10_at_10.27.32_AM Screen_Shot_2022-05-10_at_10.26.58_AM

Related to #361945 (closed)

Edited by Paul Gascou-Vaillancourt

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