Absolutely agree that this is the biggest missing feature in Textastic at the moment, since it is part of the workflow. The app is truly wonderful, but it had me really confused that I had to download a file from a server to be able to edit it, rather than just having an "Edit" button on the remote file listing. Obviously the remote file needs to be downloaded(!) but abstracting out the action of actually downloading, opening for editing, closing and deleting from the local device would make things so much easier.