### 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
if (h_scroll_enabled == p_enable) {
		return;
	}
	h_scroll_enabled = p_enable;
	update_minimum_size();
}
bool Tree::is_h_scroll_enabled() const {
	return h_scroll_enabled;
}
void Tree::set_v_scroll_enabled(bool p_enable) {
	if (v_scroll_enabled == p_enable) {
		return;
	}
	v_scroll_enabled = p_enable;
	update_minimum_size();
}
bool Tree::is_v_scroll_enabled() const {
	return v_scroll_enabled;
}
TreeItem *Tree::_search_item_text(TreeItem *p_at, const String &p_find, int *r_col, bool p_selectable, bool p_backwards) {