Changing language when app is mounted 🌐

[PierreBresson]

Mechanism to switch language when the app is open. Screen & translation of dates has already be done in #289)

Missing :

• clicking on a language should reload/remount/restart* the app with the selected language

*depending on what's possible, of course it would be even better if it's instantaneous/transparent for the user

[hb2708]

hey, @PierreBresson I will take a look at this.

[hb2708]

@PierreBresson I found a way to make it work but for that will need to set i18n.locale after the language is updated.

I am not able to find best way to do that but pushing a commit so you can take a look

[hb2708]

This is what i am trying #343
but it's not very smooth mainly the add Emission -> Main category list does not show localized text.