### 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 (matches->size() > p_max_items) {
		return;
	}
	for (int i = 0; i < p_path->get_subdir_count(); i++) {
		_search(p_path->get_subdir(i), matches, p_max_items);
	}
	for (int i = 0; i < p_path->get_file_count(); i++) {
		String file = p_path->get_file(i);
		if (file.to_lower().contains(searched_string)) {
			FileInfo fi;
			fi.name = file;
			fi.type = p_path->get_file_type(i);
			fi.path = p_path->get_file_path(i);
			fi.import_broken = !p_path->get_file_import_is_valid(i);
			fi.modified_time = p_path->get_file_modified_time(i);
			if (_is_file_type_disabled_by_feature_profile(fi.type)) {
				
				continue;
			}
			matches->push_back(fi);
			if (matches->size() > p_max_items) {
				return;
			}
		}
	}
}
struct FileSystemDock::FileInfoTypeComparator {
	bool operator()(const FileInfo &p_a, const FileInfo &p_b) const {