Added improvement image toggle next to minimap

Added indication when attacking, for which tile we will attack from

Fix opening Civilopedia from main menu when easter eggs enabled

Remove messages from defeated civilizations

Don't automate naval units in cities that only lead to enemies via impassible water routes (e.g. ice)

Uniques are never sorted alphabetically

Modding: Added validation for global unit uniques

By Ouaz:
- Fix untranslated string 
- Fix personality names