FORUM-579: [Answers] Hard-coded labels in Question Detail

Fix description: Fix also FORUM-582
Problem: Not yet implement local for question in different languages.
How to fix?

Create common method in FAQUtils.java to fix both issues.
Fix problems in FORUM-579 in files: UIQuestions.java & UIQuestions.gtmpl
Fix problems in FORUM-582 in files: UIQuestionInfos.java & UIQuestionInfos.gtmpl