Add fastEnumerationEnabled property to config

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

shell_integration/MacOSX/NextcloudIntegration/FileProviderExt/FileProviderConfig.swift

@@ -9,7 +9,7 @@ import FileProvider
 import Foundation
 
 struct FileProviderConfig {
-    enum FileProviderConfigKey: String {
+    private enum ConfigKey: String {
         case fastEnumerationEnabled = "fastEnumerationEnabled"
     }
 
@@ -30,4 +30,9 @@ struct FileProviderConfig {
             defaults.setValue(newValue, forKey: domainIdentifier.rawValue)
         }
     }
+
+    var fastEnumerationEnabled: Bool {
+        get { internalConfig[ConfigKey.fastEnumerationEnabled.rawValue] as? Bool ?? true }
+        set { internalConfig[ConfigKey.fastEnumerationEnabled.rawValue] = newValue }
+    }
 }