### Godot version

v4.1.rc2.official [46424488e]

### System information

Godot v4.1.rc2 - Linux Mint 20 (Ulyana) - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2060 SUPER (nvidia; 515.105.01) - Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (8 Threads)

### Issue description

Dragging and dropping a file to a new position inside its current folder, or onto the icon for its current folder - when that folder is the project root folder :res// - will be treated as though you were dropping a different file with the same name.

Expectation: for nothing to happen.

Also tried it in 4.0.3 and 4.1-dev3, where it behaves as expected.

https://github.com/godotengine/godot/assets/64640811/90de1120-dd92-41b8-b202-db77c343103a

### Steps to reproduce

1. New or existing project.
2. Click and drag a file in :res// in FileSystem dock.
3. Drop the file back into :res//.
4. Be prompted to overwrite or rename.

### Minimal reproduction project

N/A
String fpath = p_selected[0];
				deps_editor->edit(fpath);
			}
		} break;
		case FILE_OWNERS: {
			
			if (!p_selected.is_empty()) {
				String fpath = p_selected[0];
				owners_editor->show(fpath);
			}
		} break;
		case FILE_MOVE: {
			
			to_move.clear();
			Vector<String> collapsed_paths = _remove_self_included_paths(p_selected);
			for (int i = collapsed_paths.size() - 1; i >= 0; i--) {
				String fpath = collapsed_paths[i];
				if (fpath != "res://") {
					to_move.push_back(FileOrFolder(fpath, !fpath.ends_with("/")));
				}
			}
			if (to_move.size() > 0) {
				move_dialog->popup_centered_ratio(0.4);
			}
		} break;
		case FILE_RENAME: {
			if (!p_selected.is_empty()) {
				
				to_rename.path = p_selected[0];
				to_rename.is_file = !to_rename.path.ends_with("/");