### 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
ERR_FAIL_COND(theme_cache.font.is_null());
	Rect2i rect = p_rect.grow_individual(-theme_cache.inner_item_margin_left, -theme_cache.inner_item_margin_top, -theme_cache.inner_item_margin_right, -theme_cache.inner_item_margin_bottom);
	Size2 ts = p_cell.text_buf->get_size();
	bool rtl = is_layout_rtl();
	int w = 0;
	Size2i bmsize;
	if (!p_cell.icon.is_null()) {
		bmsize = _get_cell_icon_size(p_cell);
		w += bmsize.width + theme_cache.h_separation;
		if (rect.size.width > 0 && (w + ts.width) > rect.size.width) {
			ts.width = rect.size.width - w;
		}
	}
	w += ts.width;
	switch (p_cell.text_alignment) {
		case HORIZONTAL_ALIGNMENT_FILL:
		case HORIZONTAL_ALIGNMENT_LEFT: {
			if (rtl) {
				rect.position.x += MAX(0, (rect.size.width - w));
			}
		} break;
		case HORIZONTAL_ALIGNMENT_CENTER:
			rect.position.x += MAX(0, (rect.size.width - w) / 2);
			break;
		case HORIZONTAL_ALIGNMENT_RIGHT:
			if (!rtl) {