- Sort tags in the dropdown using user's locale.
- Fix localized tags being used for filtering. This happens when the application
freshly starts and list_tags() is called using user's non-default locale.
- Avoid using element.textContent in JS. Instead use datasets.
- Add functional test for checking localization issues.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>