FilterHelperOverrides helper hardcodes deconstantize call, we should add detection for '::' and use it only if it's present, otherwise engines that are not isolated in own namespace (e.g. RemoteExecution) can't add their own autocompletion search overrides.

see the code for more details https://github.com/theforeman/foreman/blob/develop/app/helpers/filters_helper_overrides.rb#L13