Make "\kNavigationBar::getCategoryParentPath" method language-aware

In the "\kNavigationBar::getCategoryParentPath" method:

1. use "\kMultiLanguageHelper::getLanguages" to iterate over all enabled languages and query translations of used categories on all languages
2. include language serial in cache key, to auto-reset cache when language is added/removed or primary language is changed
3. set category text for a given language into category text from primary language, when category text on given language is missing