### 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
_toggle_editable_children(node);
				}
			}
		} break;
		case TOOL_SCENE_USE_PLACEHOLDER: {
			if (!profile_allow_editing) {
				break;
			}
			List<Node *> selection = editor_selection->get_selected_node_list();
			List<Node *>::Element *e = selection.front();
			if (e) {
				Node *node = e->get();
				if (node) {
					bool editable = EditorNode::get_singleton()->get_edited_scene()->is_editable_instance(node);
					bool placeholder = node->get_scene_instance_load_placeholder();
					
					if (editable && !placeholder) {
						placeholder_editable_instance_remove_dialog->set_text(TTR("Enabling \"Load As Placeholder\" will disable \"Editable Children\" and cause all properties of the node to be reverted to their default."));
						placeholder_editable_instance_remove_dialog->popup_centered();
						break;
					}
					placeholder = !placeholder;
					if (placeholder) {
						EditorNode::get_singleton()->get_edited_scene()->set_editable_instance(node, false);
					}
					node->set_scene_instance_load_placeholder(placeholder);
					scene_tree->update_tree();
				}
			}
		} break;