Add more airlines and fix edit bugs

app/Models/Airline.php

@@ -27,6 +27,10 @@ class Airline extends Model
 
     public $timestamps = false;
 
+    public function displayName() : string {
+        return "{$this->name} ({$this->IATA_code}/{$this->ICAO_code})";
+    }
+
     public function country(): BelongsTo
     {
         return $this->belongsTo(Country::class);