Console: Added set/remove tile improvement

Console: Show available commands on empty command

Console: Added add/remove for cities

Move city founding effects to the proper function

By SomeTroglodyte:
- Tweak Language Pickers to scroll the selected one into view when appropriate, and allow selection with letter keys 
- Comment unique 
- Sound cache preloader 
- Fix OpenAL error Windows Events after application ends 
- Latin reboot 
- Fix City ambient sounds 
- "Fixed" Rusyn language 
- Fixed Bosnian 

Get distance to nearest enemy rework  - By tuvus

By Why-not-now:
- Fixed typo 
- Standardise using enum instead of string 
- Fixed typo 
- Standardise using enum instead of string