Fix extra election spam events

- Use vanilla's extra election events for major political issues
Add Lucky Nations event

- Add lucky nations events from Napoleon's legacy
Fix wars

- Split Caucasian war into two different wars: Caucasian war and Russian-Circassian war
- Fix casus belli for Massina Jihad and Cochinchina campain
- Add war's end to Taiping rebellion and Caucasian wars
Remove size and eff terrain modifiers

- Revert size and efficiency modifiers from terrain file
TODO: Test the original modifiers