### 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 (files_item_idx != -1) {
					files->select(files_item_idx);
				}
			}
		}
	}
	if (key.is_valid() && key->is_pressed() && !key->is_echo()) {
		if (ED_IS_SHORTCUT("filesystem_dock/duplicate", p_event)) {
			_tree_rmb_option(FILE_DUPLICATE);
		} else if (ED_IS_SHORTCUT("filesystem_dock/copy_path", p_event)) {
			_tree_rmb_option(FILE_COPY_PATH);
		} else if (ED_IS_SHORTCUT("filesystem_dock/copy_uid", p_event)) {
			_tree_rmb_option(FILE_COPY_UID);
		} else if (ED_IS_SHORTCUT("filesystem_dock/delete", p_event)) {
			_tree_rmb_option(FILE_REMOVE);
		} else if (ED_IS_SHORTCUT("filesystem_dock/rename", p_event)) {
			_tree_rmb_option(FILE_RENAME);
		} else if (ED_IS_SHORTCUT("filesystem_dock/show_in_explorer", p_event)) {
			_tree_rmb_option(FILE_SHOW_IN_EXPLORER);
		} else if (ED_IS_SHORTCUT("filesystem_dock/open_in_external_program", p_event)) {
			_tree_rmb_option(FILE_OPEN_EXTERNAL);
		} else if (ED_IS_SHORTCUT("editor/open_search", p_event)) {
			focus_on_filter();
		} else {
			return;
		}
		accept_event();
	}
}
void FileSystemDock::_file_list_gui_input(Ref<InputEvent> p_event) {