After playing with modifiers play same map with no modifiers doesn't reset

[Kylon99]

1. Play a map with modifiers like No Arrows
2. Quit
3. Choose another AlternativePlay settings with no modifiers
4. Play the same map again

Expected Result
The map should be cleared of any modifiers.

Actual Result
The map plays again with the same modifiers as the first time.

The way maps are loaded and modified in memory probably changed. In the past it was probably loaded every time and our code hooks into that. Now it probably just caches the map in memory and it needs to be modified again. We may need to force it to reload rather than 'modify' the map further in memory.