When editing a layout, search existing custom fields by 'internal name'

The internal name of a custom field is used to group together the fields that are applicable to a certain group or use case within the organisation. Creating standards for layouts requires custom fields for that internal name to be applied. Widening the search within the layout editor to include the internal name would allow the user to pull back all existing custom fields for that group or use case and ensure consistency without having to search for each individual custom field and keep a master list somewhere of which fields use that internal name.