Fix "black screen on next turn button"

Context menu indicators no longer always visible

City buttons center correctly on the tile on zoom-in

Yields no longer overlaps population icons in cities

By SomeTroglodyte:
- Make gesture timings user-settable in Options-Advanced 
- Fix "Choose a music track" triggerable in unique builder 
- Fix city-states always have personality "Friendly" 

Prevent automation from orphaning CreatesOneImprovement markers - By superdusto