GhostWriter Beta and AI Mode

Showing the correct code recommendation is only half of the equation. Very often, users keep typing even after the code recommendation is shown. If you type something that matches the suggestion, we need to adjust the suggestion shown on screen to hide the part the user has typed--and resurface it when you hit backspace. What's more, when you type, the editor would autocomplete a beginning bracket whose corresponding ending bracket; we want to make sure the latter appears in the right spot.