### Godot version

v4.1.1.stable.official [bd6af8e0e]

### System information

Godot v4.1.1.stable - Debian GNU/Linux trixie/sid trixie - Vulkan (Compatibility) - Mesa Intel(R) HD Graphics 520 (SKL GT2) () - Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz (4 Threads)

### Issue description

After right clicking in thet "Filter Nodes" menu in the scene tree dock, the sub-menu is populated with a "Search" icon.

If I later switch themes in the same session, this icon is never updated to match the new theme.

![image](https://github.com/godotengine/godot/assets/660911/14336bb3-12ca-48c8-b030-8ada6ac27ec6)


### Steps to reproduce

1. Right click in the "Filter Nodes" menu in scene tree dock
2. Switch themes
3. Right click again in the "Filter Nodes" menu

Expected result: Icon has updated to match the theme I am currently using
Actual result: Icon is still using the theme I launched Godot with

### Minimal reproduction project

N/A
EditorNode::get_singleton()->edit_resource(p_script);
}
void SceneTreeDock::_push_item(Object *p_object) {
	Node *node = Object::cast_to<Node>(p_object);
	if (node || !p_object) {
		
		EditorNode::get_singleton()->push_node_item(node);
	} else {
		EditorNode::get_singleton()->push_item(p_object);
	}
	if (p_object == nullptr) {
		EditorNode::get_singleton()->hide_unused_editors(this);
	}
}
void SceneTreeDock::_handle_select(Node *p_node) {
	if (tree_clicked) {
		pending_click_select = p_node;
	} else {
		_push_item(p_node);
	}
}
void SceneTreeDock::_node_selected() {
	Node *node = scene_tree->get_selected();
	if (!node) {
		return;
	}
	_handle_select(node);
}
void SceneTreeDock::_node_renamed() {