Invalid HTML in heading <h3>Datasets in Showcase</h2>

[Chealer]

showcase_info.html's last section uses invalid HTML for its "Datasets in Showcase" heading: <h3 class="module-heading"><i class="fa fa-sitemap icon-medium icon-sitemap"></i> {{ _('Datasets in Showcase') }}</h2> Either the opening tag should be an h2, or the closing tag should be an h3. According to the context, it is the opening tag which should be an h2.

This is a regression from commit 5b37ca68d3482f10bc6b86690f6b42b3a36c1f32. master (version 1.3.0) is still affected.