fix 't.apps is not iterable'

src/SideMenuBig.vue

@@ -64,8 +64,8 @@ export default {
                     let apps = []
 
                     for (let category of that.items) {
-                        for (let app of category.apps) {
-                            apps.push(app)
+                        for (let a in category.apps) {
+                            apps.push(category.apps[a])
                         }
                     }