Flatten user preferences in user store (#2587)

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

src/renderer/components/locale-date/locale-date.tsx

@@ -10,9 +10,8 @@ interface Props {
 @observer
 export class LocaleDate extends React.Component<Props> {
   render() {
-    const { preferences } = UserStore.getInstance();
     const { date } = this.props;
 
-    return <>{moment.tz(date, preferences.localeTimezone).format()}</>;
+    return moment.tz(date, UserStore.getInstance().localeTimezone).format();
   }
 }