Hide beta ribbon for non-large screens

Since "beta version" ribbon obstructs view on medium and small screens, hide it for smaller than large screens Related #1477 (closed)

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Migrated from D1505 (view on Phabricator)

swh/web/templates/browse/layout.html

@@ -18,6 +18,6 @@ See top-level LICENSE file for more information
 {% endblock %}
 
 {% block content %}
-<div class="swh-corner-ribbon">Beta version</div>
+<div class="swh-corner-ribbon d-none d-lg-block">Beta version</div>
 {% block browse-content %}{% endblock %}
 {% endblock %}