### Godot version

4.2 dev1

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

Calling `Tree.propagate_check()` after an item is unchecked does not properly uncheck the parents. They are left in partially checked state.

It's easy to observe in theme editor:

https://github.com/godotengine/godot/assets/2223172/71d0479c-0a5e-48d3-957f-d90379a95c22



### Steps to reproduce

1. Edit a Theme resource
2. Go to Manage Items... menu
3. Go to Import Items tab
4. Unfold something
5. Check and uncheck a child checkbox

### Minimal reproduction project

N/A
y_ofs += child_h;
				c = c->next;
				item_h += child_h;
			}
		}
		if (p_item == root) {
			emit_signal(SNAME("empty_clicked"), get_local_mouse_position(), p_button);
		}
	}
	return item_h; 
}
void Tree::_text_editor_popup_modal_close() {
	if (Input::get_singleton()->is_key_pressed(Key::ESCAPE) ||
			Input::get_singleton()->is_key_pressed(Key::KP_ENTER) ||
			Input::get_singleton()->is_key_pressed(Key::ENTER)) {
		return;
	}
	if (value_editor->has_point(value_editor->get_local_mouse_position())) {
		return;
	}
	if (!popup_edited_item) {
		return;
	}
	if (popup_edited_item->is_edit_multiline(popup_edited_item_col) && popup_edited_item->get_cell_mode(popup_edited_item_col) == TreeItem::CELL_MODE_STRING) {
		_apply_multiline_edit();
	} else {
		_line_editor_submit(line_editor->get_text());
	}
}
void Tree::_text_editor_gui_input(const Ref<InputEvent> &p_event) {