E2EE: remove the possibility of decrypted a subfolder

iOSClient/Main/CCMain.m

@@ -3398,7 +3398,7 @@
                                     }];
         }
         
-        if (self.metadata.e2eEncrypted && [CCUtility isEndToEndEnabled:appDelegate.activeAccount]) {
+        if (self.metadata.e2eEncrypted && !_metadataFolder.e2eEncrypted && [CCUtility isEndToEndEnabled:appDelegate.activeAccount]) {
             
             [actionSheet addButtonWithTitle:NSLocalizedString(@"_e2e_remove_folder_encrypted_", nil)
                                       image:[CCGraphics changeThemingColorImage:[UIImage imageNamed:@"lock"] multiplier:2 color:[NCBrandColor sharedInstance].icon]