Fix desynced UI (#727)

editor/src/layout/layout_message.rs

@@ -7,6 +7,7 @@ use serde::{Deserialize, Serialize};
 #[impl_message(Message, Layout)]
 #[derive(PartialEq, Clone, Deserialize, Serialize, Debug)]
 pub enum LayoutMessage {
+	RefreshLayout { layout_target: LayoutTarget },
 	SendLayout { layout: Layout, layout_target: LayoutTarget },
 	UpdateLayout { layout_target: LayoutTarget, widget_id: u64, value: serde_json::Value },
 }