### 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
} else {
					external_program = EDITOR_GET("filesystem/external_programs/raster_image_editor");
				}
			} else if (ClassDB::is_parent_class(resource_type, "AudioStream")) {
				external_program = EDITOR_GET("filesystem/external_programs/audio_editor");
			} else if (resource_type == "PackedScene") {
				
				if (file.get_extension() != "tscn" && file.get_extension() != "scn" && file.get_extension() != "res") {
					external_program = EDITOR_GET("filesystem/external_programs/3d_model_editor");
				}
			} else if (ClassDB::is_parent_class(resource_type, "Script")) {
				external_program = EDITOR_GET("text_editor/external/exec_path");
			}
			if (external_program.is_empty()) {
				OS::get_singleton()->shell_open(file);
			} else {
				List<String> args;
				args.push_back(file);
				OS::get_singleton()->create_process(external_program, args);
			}
		} break;
		case FILE_OPEN: {
			
			TreeItem *selected = tree->get_root();
			selected = tree->get_next_selected(selected);
			while (selected) {
				if (p_selected.find(selected->get_metadata(0)) >= 0) {
					selected->set_collapsed(false);
				}
				selected = tree->get_next_selected(selected);