Godot version:
3.1 b293dd3 calinou
OS/device including version:
Windows 10 HD 4600
Issue description:
Replacing the names of two files with each other is a bit difficult because there is a risk of confusion, therefore I would postulate adding an option available after selecting two items in the File System to replace the names of these items(on image below).
I. Now to rename files with each other:
II. When this option is available, the above option will replace the names:

Would this really be useful? I mean, if something would be responsible for renaming, it would be a file manager of the OS, and it doesn't have this feature as far as I know. I don't think there's a shell command for it either.
https://stackoverflow.com/questions/1115904/shortest-way-to-swap-two-files-in-bash
I also don't think it's a good idea, it's not our job and if even OS file manager don't do it, there's no reason we should.
Most helpful comment
Would this really be useful? I mean, if something would be responsible for renaming, it would be a file manager of the OS, and it doesn't have this feature as far as I know. I don't think there's a shell command for it either.
https://stackoverflow.com/questions/1115904/shortest-way-to-swap-two-files-in-bash