Filter out undefined values in hotbar-store migration (#3489)

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/migrations/hotbar-store/5.0.0-beta.10.ts

@@ -40,7 +40,7 @@ interface Pre500WorkspaceStoreModel {
 export default {
   version: "5.0.0-beta.10",
   run(store) {
-    const hotbars: Hotbar[] = store.get("hotbars");
+    const hotbars = (store.get("hotbars") as Hotbar[] ?? []).filter(Boolean);
     const userDataPath = app.getPath("userData");
 
     try {