Dropdown swapping mode

[C0untFloyd]

          1. In the changelog it says Selecting target face now automatically switches swapping mode to selected but this is not applied if only one face is visible in the selected frame (when the face selection doesn't pop up it doesn't switch swapping method automatically to selected face), not sure if that's intended but I guess not?

2. The Processed File(s) list after processing any video/image is copied from the output folder to temp, the UI doesn't take them directly from the output folder (for download or preview etc.). In other words if you have let's say 10 files in the output folder for example and then swap any image/video, the whole videos and images in the output folder gets copied to the temp folder (each with its own folder) even if you start with a completely empty temp folder. I think the UI can only read from the temp folder for the Processed File(s) list.

Originally posted by @eniora in #81 (comment)

[C0untFloyd]

1. Fixed
2. Yes, it's a server security measure and handled by Gradio. Probably no better way for a browser app.