Issue #2541416 by Jaesin: Block content view is missing the 'default' tag

core/modules/block_content/config/optional/views.view.block_content.yml

@@ -8,7 +8,7 @@ id: block_content
 label: 'Custom block library'
 module: views
 description: 'Find and manage custom blocks.'
-tag: ''
+tag: default
 base_table: block_content_field_data
 base_field: id
 core: 8.x