Better AI evaluation for 'win the game' buildings

Modding:
- Trigger uniques from religious beliefs activate correctly
- Added "removing the [promotion] promotion/status" unit action modifier
- Added 'upon gaining/losing [promotionName] promotion' unit trigger uniques 
- Allow comment uniques and timed uniques in event choices

Re-activate Thai language, now with diacritic support

Improve AI tech and policy choices  - By EmperorPinguin