Deleted files still appearing in rclone crypt over webdav

[sagarbehere]

Thank you for this excellent and very useful app :-)

I just installed ccViewer on my iPhone, added a WebDAV repository and an encrypted rclone repository in the WebDAV. Everything works well and I can see all the encrypted files in the rclone repository. However, after some files in the rclone repository were deleted from other device, they are still shown by ccViewer. Refreshing (swiping down on the screen) the folder contents does not fix the issue. The deleted files remain visible. These files are not visible on other devices, so it is an issue with ccViewer. I tried purging the network cache, but this did not help. I think this may be a bug, similar to the one mentioned in #29