User configurable locale (language) (#10204)

* Support for system APP_LOCALE

* Start preferences re-write

* port 2fa form

* Working user preferences

* Language user preference

* Don't look up locale from the DB every request

* Device list working

* Deny demo user middleware

* Finish password changing

* remove used resource methods

* remove leftover use

* warn that translation is incomplete

* fix style

app/Http/Kernel.php

@@ -34,6 +34,7 @@ class Kernel extends HttpKernel
             \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
             \Illuminate\Session\Middleware\StartSession::class,
             // \Illuminate\Session\Middleware\AuthenticateSession::class,
+            \App\Http\Middleware\SetLocale::class,
             \Illuminate\View\Middleware\ShareErrorsFromSession::class,
             \App\Http\Middleware\VerifyCsrfToken::class,
             \App\Http\Middleware\LegacyExternalAuth::class,
@@ -66,6 +67,7 @@ class Kernel extends HttpKernel
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
         'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
         'can' => \Illuminate\Auth\Middleware\Authorize::class,
+        'deny-demo' => \App\Http\Middleware\DenyDemoUser::class,
         'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
         'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,