### 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
} break;
		case FILE_COPY_PATH: {
			if (!p_selected.is_empty()) {
				String fpath = p_selected[0];
				DisplayServer::get_singleton()->clipboard_set(fpath);
			}
		} break;
		case FILE_COPY_UID: {
			if (!p_selected.is_empty()) {
				ResourceUID::ID uid = ResourceLoader::get_resource_uid(p_selected[0]);
				if (uid != ResourceUID::INVALID_ID) {
					String uid_string = ResourceUID::get_singleton()->id_to_text(uid);
					DisplayServer::get_singleton()->clipboard_set(uid_string);
				}
			}
		} break;
		case FILE_NEW_RESOURCE: {
			new_resource_dialog->popup_create(true);
		} break;
		case FILE_NEW_TEXTFILE: {
			String fpath = current_path;
			if (!fpath.ends_with("/")) {
				fpath = fpath.get_base_dir();
			}
			String dir = ProjectSettings::get_singleton()->globalize_path(fpath);
			ScriptEditor::get_singleton()->open_text_file_create_dialog(dir);
		} break;
	}
}
void FileSystemDock::_resource_created() {