Notifications fixes (#804)

* Emails not sending #795 #722

* Fix for news items not being sent; refactor some events; check for opt-in #722

* Formatting

* Remove extra parameter

app/Database/factories/UserFactory.php

@@ -1,7 +1,9 @@
 <?php
 
+use App\Models\Airline;
 use App\Models\Enums\UserState;
 use Faker\Generator as Faker;
+use Illuminate\Support\Facades\Hash;
 
 $factory->define(App\Models\User::class, function (Faker $faker) {
     static $password;
@@ -14,7 +16,7 @@ $factory->define(App\Models\User::class, function (Faker $faker) {
         'password'   => $password ?: $password = Hash::make('secret'),
         'api_key'    => $faker->sha1,
         'airline_id' => function () {
-            return factory(\App\Models\Airline::class)->create()->id;
+            return factory(Airline::class)->create()->id;
         },
         'rank_id'        => 1,
         'flights'        => $faker->numberBetween(0, 1000),