Added support for a new "translated" filter, to allow exporting only strings with translations to an XLIFF translation job file.
The reason we should not export a string to the translation job XLIFF file if it exists in the primary language JSON file but doesn't exist in the translatable language JSON file, is because such strings that don't exist in translatable language file have been filtered out because they are branded strings for brands that do not support the language for which the XLIFF file is being exported.