Fix onboarding.

src/context/intermediate/Modals.tsx

@@ -17,7 +17,7 @@ export interface Props {
 
 export default function Modals({ screen, openScreen }: Props) {
     const onClose = () =>
-        isModalClosing
+        isModalClosing || screen.id === "onboarding"
             ? openScreen({ id: "none" })
             : internalEmit("Modal", "close");
 

src/context/intermediate/modals/Onboarding.tsx

@@ -28,7 +28,7 @@ export function OnboardingModal({ onClose, callback }: Props) {
     const onSubmit: SubmitHandler<FormInputs> = ({ username }) => {
         setLoading(true);
         callback(username, true)
-            .then(onClose)
+            .then(() => onClose())
             .catch((err: any) => {
                 setError(takeError(err));
                 setLoading(false);