### 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
if (p_efsd == nullptr) {
		return;
	}
	for (int i = 0; i < p_efsd->get_subdir_count(); i++) {
		r_folders.push_back(p_efsd->get_subdir(i)->get_path());
		_get_all_items_in_dir(p_efsd->get_subdir(i), r_files, r_folders);
	}
	for (int i = 0; i < p_efsd->get_file_count(); i++) {
		r_files.push_back(p_efsd->get_file_path(i));
	}
}
void FileSystemDock::_find_remaps(EditorFileSystemDirectory *p_efsd, const HashMap<String, String> &r_renames, Vector<String> &r_to_remaps) const {
	for (int i = 0; i < p_efsd->get_subdir_count(); i++) {
		_find_remaps(p_efsd->get_subdir(i), r_renames, r_to_remaps);
	}
	for (int i = 0; i < p_efsd->get_file_count(); i++) {
		Vector<String> deps = p_efsd->get_file_deps(i);
		for (int j = 0; j < deps.size(); j++) {
			if (r_renames.has(deps[j])) {
				r_to_remaps.push_back(p_efsd->get_file_path(i));
				break;
			}
		}
	}
}
void FileSystemDock::_try_move_item(const FileOrFolder &p_item, const String &p_new_path,