By SeventhM:
- Fix unique Great Prophets not having the correct cost when buying at an increasing cost
- Fix free units with a build limit not spawning
- Fix AI getting stuck when it can't promote with enough xp

Allow the Space key to close Alert popups with no actual choice  - By SomeTroglodyte

By tuvus:
- Fixed politics tab not showing defensive pacts
- Defensive pact Tests