### 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
List<Ref<Resource>> cached;
	ResourceCache::get_cached_resources(&cached);
	for (Ref<Resource> &r : cached) {
		String base_path = r->get_path();
		String extra_path;
		int sep_pos = r->get_path().find("::");
		if (sep_pos >= 0) {
			extra_path = base_path.substr(sep_pos, base_path.length());
			base_path = base_path.substr(0, sep_pos);
		}
		if (p_renames.has(base_path)) {
			base_path = p_renames[base_path];
		}
		r->set_path(base_path + extra_path);
	}
	for (int i = 0; i < EditorNode::get_editor_data().get_edited_scene_count(); i++) {
		String file_path;
		if (i == EditorNode::get_editor_data().get_edited_scene()) {
			if (!get_tree()->get_edited_scene_root()) {
				continue;
			}
			file_path = get_tree()->get_edited_scene_root()->get_scene_file_path();
		} else {
			file_path = EditorNode::get_editor_data().get_scene_path(i);
		}
		if (p_renames.has(file_path)) {