Fix locale
Fix locale

Locale cannot be determined from env vars on Windows.
To be portable, we must use electron's standard app.getLocale() function.
But it cannot be used before the ready event is fired.

nono/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop