Added is_first_session/isFirstSession to initialState

• Added:
- is_first_session/isFirstSession to initialState

app/javascript/gabsocial/initial_state.js

@@ -25,5 +25,6 @@ export const unreadCount = getMeta('unread_count');
 export const lastReadNotificationId = getMeta('last_read_notification_id');
 export const monthlyExpensesComplete = getMeta('monthly_expenses_complete');
 export const favouritesCount = getMeta('favourites_count');
+export const isFirstSession = getMeta('is_first_session');
 
 export default initialState;