Issue #3165141: Set the default filter to "Strip Tags"

Closes #3165141

config/schema/diff.schema.yml

@@ -15,6 +15,9 @@ diff.settings:
         context_lines_trailing:
           type: integer
           label: 'Number of trailing context lines'
+        default_filter:
+          type: string
+          label: 'Default filter on fields based comparison'          
         revision_pager_limit:
           type: integer
           label: 'Revisions per page to be displayed in diff pager'