### 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
_tool_selected(TOOL_INSTANTIATE, true);
}
List<Node *> SceneTreeDock::paste_nodes() {
	List<Node *> pasted_nodes;
	if (node_clipboard.is_empty()) {
		return pasted_nodes;
	}
	bool has_cycle = false;
	if (edited_scene && !edited_scene->get_scene_file_path().is_empty()) {
		for (Node *E : node_clipboard) {
			if (edited_scene->get_scene_file_path() == E->get_scene_file_path()) {
				has_cycle = true;
				break;
			}
		}
	}
	if (has_cycle) {
		current_option = -1;
		accept->set_text(TTR("Can't paste root node into the same scene."));
		accept->popup_centered();
		return pasted_nodes;
	}
	Node *paste_parent = edited_scene;
	List<Node *> selection = editor_selection->get_selected_node_list();
	if (selection.size() > 0) {
		paste_parent = selection.back()->get();
	}
	Node *owner = nullptr;
	if (paste_parent) {
		owner = paste_parent->get_owner();