i18n browser and feedback form

Feedback form handle unicode character in reporter name and content #2928 #2615 

**WARNING please modify issue_email (to avoid spamming wormbase-help mailing list)** and probably github_repo
 Issue tracking and reporting
- issue_email = you@youremail.org

link issues to github repo 
- github_repo = "[YOUR-FORK-REPO]/website"