Is it possible to let my plugin know when a user saves a file? My plugin is used to pull text files off a remote server, and then store them on the local machine for the user to edit them. In the end, I'd like for the user to just be able to hit save, and then the plugin would take care of updating the file on the server. Is there some sort of event that is triggered when a user saves that I could use to signal the plugin to upload the modified file? Any help will be appreciated immensely.