* When the language pack being deleted is
- the same as the site default language, we must set the site default
language to 'en'.
- fix the user's current language to the default site language.
Before this change if a language pack was updated by the
\tool_langimport\task\update_langpacks_task scheduled task, changes
would not be available to users until an admin manually cleared the
strings cache.
This change causes the cache to purged when a language pack it update,
this will cause it to rebuild so users will start seeing updates
automatically.
Jun Pataleta