Add spoiler protection when opening the app within 36 hours after a race

To allow using the app when watching a race after it has finished, when the app loads and the latest race finished within the last 36 hours, the user should be asked if they have seen the last race. If not, the app should show data only up to the race before. After which, there should be a button saying "Show latest race (circuit)" that syncs with the most recent results.