### Godot version

4.0 beta 10

### System information

Windows 11 Vulkan

### Issue description

Looked through the issues list, but couldn't find something like this, sorry in advance if this has already been reported.

There is a few cases (in the pictures below) where list of Actions in Input Map may not always show a scrollbar even if the actions list overflows (I imagine this could also happen for the widget that Input Map uses).

![image](https://user-images.githubusercontent.com/39958198/210003566-cf60dbaf-921f-485b-b0a9-51ffc28d0244.png)

![New Bitmap image](https://user-images.githubusercontent.com/39958198/210004079-8eb2e6a1-0cf5-4a7c-8905-a4e3cfd0ec5d.png)

![image](https://user-images.githubusercontent.com/39958198/210004165-a6b6790b-248a-4f68-b4d0-b44b25afdf4f.png)

![image](https://user-images.githubusercontent.com/39958198/210004537-aca52194-a464-48b9-b818-24782706de45.png)


### Steps to reproduce

The pictures are clearer than anything I could write here: "a picture is worth 1000 words"

### Minimal reproduction project

N/A
if (disable_folding == p_disable) {
		return;
	}
	disable_folding = p_disable;
	for (Cell &c : cells) {
		c.cached_minimum_size_dirty = true;
	}
	_changed_notify(0);
}
bool TreeItem::is_folding_disabled() const {
	return disable_folding;
}
Size2 TreeItem::get_minimum_size(int p_column) {
	ERR_FAIL_INDEX_V(p_column, cells.size(), Size2());
	Tree *parent_tree = get_tree();
	ERR_FAIL_COND_V(!parent_tree, Size2());
	const TreeItem::Cell &cell = cells[p_column];
	if (cell.cached_minimum_size_dirty) {
		Size2 size;
		
		if (!cell.text.is_empty()) {
			if (cell.dirty) {
				parent_tree->update_item_cell(this, p_column);
			}
			Size2 text_size = cell.text_buf->get_size();
			size.width += text_size.width;
			size.height = MAX(size.height, text_size.height);
		}