### Godot version

4.1

### 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


https://github.com/godotengine/godot/assets/2223172/3c8ee782-9d5f-42e3-a70f-d2aa59a233dd

We correctly clamp the size to 16x16 everywhere except here (probably).

### Steps to reproduce

1. Add a class with custom icon, e.g.
```GDScript
@icon("res://icon.svg")
extends Node
class_name Icon
```
2. Add it to scene
3. Open Script Editor and drag the node to script editor

### Minimal reproduction project

N/A
}
		}
	}
	if (keep) {
		p_parent->clear_custom_color(0);
		p_parent->set_selectable(0, true);
	} else if (keep_for_children) {
		p_parent->set_custom_color(0, get_theme_color(SNAME("disabled_font_color"), SNAME("Editor")));
		p_parent->set_selectable(0, false);
		p_parent->deselect(0);
	}
	if (editor_selection) {
		Node *n = get_node(p_parent->get_metadata(0));
		if (keep) {
			if (p_scroll_to_selected && n && editor_selection->is_selected(n)) {
				tree->scroll_to_item(p_parent);
			}
		} else {
			if (n && p_parent->is_selected(0)) {
				editor_selection->remove_node(n);
				p_parent->deselect(0);
			}
		}
	}
	return keep || keep_for_children;
}
bool SceneTreeEditor::_item_matches_all_terms(TreeItem *p_item, PackedStringArray p_terms) {
	if (p_terms.is_empty()) {
		return true;
	}