Override Octavia views template for pages

agaric/templates/views/views-view--page.html.twig

@@ -0,0 +1,19 @@
+{% extends "@stable/views/views-view.html.twig" %}
+{% set style = view.getStyle().getPluginId() %}
+{% set default_row_class = view.style_plugin.options.default_row_class %}
+{% set has_view_mode = view.rowPlugin.options['view_mode'] is defined or view.rowPlugin.options['view_modes'] is defined %}
+{#
+  Only apply to unformatted (default) displays without a row class and with a
+  selected view mode.
+#}
+{% if (style == 'default') and (not default_row_class) and has_view_mode %}
+  {# Add columns classes to the wrapper. #}
+  {%
+    set classes = [
+      'columns',
+      'is-multiline',
+      'is-centered'
+    ]
+  %}
+  {% set attributes = attributes.addClass(classes) %}
+{% endif %}