Replace Kirby hook related to file type with hidden field

site/blueprints/files/image.yml

@@ -10,3 +10,7 @@ fields:
         help:
             en: "Short description displayed if the image can't be loaded (also used by screen readers)."
             fr: "Courte description affichée si l'image ne peut être chargée (également utilisée par les lecteurs d'écran)."
+    # Hidden field
+    file_type:
+        type: hidden
+        default: "{{ file.type }}"

site/config/config.php

@@ -26,7 +26,7 @@ return [
                 'link' => 'pages/media-library',
                 'current' => function (string $current): bool { // Override default menu entry highlighting
                     $path = Kirby\Cms\App::instance()->path();
-                    return Str::contains($path, 'pages/media-library');
+                    return Str::contains($path, 'pages/media-library'); // Link of current menu entry
                 },
             ],
             'users',
@@ -38,17 +38,6 @@ return [
         'intro' => false,
         'byLine' => 'Sitemap generated with <a href="https://github.com/kirbyzone/sitemapper" target="_blank">Sitemapper by Kirbyzone</a>.'
     ],
-    // Hooks
-    'hooks' => [
-        'file.create:after' => function($file) {
-            // Populate file_type field with $file->type() method after file creation
-            if ($file->type()) {
-                $file->update([
-                    'file_type' => $file->type()
-                ]);
-            }
-        }
-    ],
     // Thumbnails and srcsets presets
     'thumbs' => [
         'srcsets' => [