### 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_INDEX_V(p_column, columns.size(), "");
	return columns[p_column].title;
}
void Tree::set_column_title_alignment(int p_column, HorizontalAlignment p_alignment) {
	ERR_FAIL_INDEX(p_column, columns.size());
	if (p_alignment == HORIZONTAL_ALIGNMENT_FILL) {
		WARN_PRINT("HORIZONTAL_ALIGNMENT_FILL is not supported for column titles.");
	}
	if (columns[p_column].title_alignment == p_alignment) {
		return;
	}
	columns.write[p_column].title_alignment = p_alignment;
	update_column(p_column);
	queue_redraw();
}
HorizontalAlignment Tree::get_column_title_alignment(int p_column) const {
	ERR_FAIL_INDEX_V(p_column, columns.size(), HorizontalAlignment::HORIZONTAL_ALIGNMENT_CENTER);
	return columns[p_column].title_alignment;
}
void Tree::set_column_title_direction(int p_column, Control::TextDirection p_text_direction) {
	ERR_FAIL_INDEX(p_column, columns.size());
	ERR_FAIL_COND((int)p_text_direction < -1 || (int)p_text_direction > 3);
	if (columns[p_column].text_direction != p_text_direction) {
		columns.write[p_column].text_direction = p_text_direction;
		update_column(p_column);
		queue_redraw();
	}
}
Control::TextDirection Tree::get_column_title_direction(int p_column) const {