Fix 'valid_mime' issue in config file

'valid_mime' and 'startup_view' values for 'file' and 'image' categories is vice-versa. I swapped them and it's correct now.

Author: amirzpr

src/config/lfm.php

@@ -48,28 +48,28 @@
     'folder_categories'        => [
         'file'  => [
             'folder_name'  => 'files',
-            'startup_view' => 'grid',
+            'startup_view' => 'list',
             'max_size'     => 50000, // size in KB
             'valid_mime'   => [
                 'image/jpeg',
                 'image/pjpeg',
                 'image/png',
                 'image/gif',
                 'image/svg+xml',
+                'application/pdf',
+                'text/plain',
             ],
         ],
         'image' => [
             'folder_name'  => 'photos',
-            'startup_view' => 'list',
+            'startup_view' => 'grid',
             'max_size'     => 50000, // size in KB
             'valid_mime'   => [
                 'image/jpeg',
                 'image/pjpeg',
                 'image/png',
                 'image/gif',
                 'image/svg+xml',
-                'application/pdf',
-                'text/plain',
             ],
         ],
     ],