Fix made updating the file Class representation for an extension less aggressive and allows for subclasses of registered file extensions
Fix made updating the file Class representation for an extension less aggressive and allows for subclasses of registered file extensions

open-sausages/silverstripe-assets-gallery,open-sausages/silverstripe-asset-admin,open-sausages/silverstripe-assets-gallery,open-sausages/silverstripe-asset-admin,silverstripe/silverstripe-asset-admin,silverstripe/silverstripe-asset-admin