Build 2021-04-13

More polish:

• the fade out (to black on exit, to white on reload) now stretches far enough on wide screen (I hate when games forget wide screens)
• guards should no longer get stuck in place and return to their route
• … and actually start patrolling again instead of just standing there
• the level transition now actually waits for the zoom-in-effect to be completed
• removed some wird camera jump in the hub level