Unsupported Pseudo Random Tour 1.5.2

A few fixes and some new features and general improvements:

• Fixed an issue with the circuit generator backup system getting stuck in an infinite loop in certain conditions
• Fixed saving not working properly if the scenario is reset beforehand
• Fixed 'keep current vehicle' option not working when loading a route
• Fixed 'always sunny' option not removing the weather affect from a previously generated route
• Fixed waypoint UI not resetting once a new path is generated
• Fixed second waypoint not showing up on the map UI at the start

• Routes now obey road direction, so no more paths leading to oncoming traffic
• Better route generation for routes larger than the map (ie. no more circuits) - far less chance of u-turns as well
• Randomised road-arrow indicator's colour (colours generated are always bright so as to not be hard to see)
• Adjust some achievements (changes below are for all tiers; the values are for the diamond tier):
• 'Lifetime Waypoints' - increased from 800 -> 1200
• 'Single Scenario Waypoints' - decreased from 400 -> 160
• 'Single Scenario Distance' - decreased from 40km -> 32km
• UI now remembers the last used settings between generating routes
• Added in route driveability metric to the generated preview - shows the asphalt to offroad score