The bulk of the index pattern field editor bundle size is the field format editor. Lets lazy load it. <img width="641" alt="118674074-6dad3000-b7f1-11eb-9448-aaa1811d53b5" src="https://user-images.githubusercontent.com/216176/118883080-7a498b00-b8ba-11eb-94ca-2c913d19bca6.png">