Alpha v2.1.0410

Updates/Changes:
- Icon display for polluting buildings
- Other floating cities only spawn once each
- Trapper asset updates
- Major optimization for other city spawning
- New Wavebreaker Destroyer ship asset for purging event
- Deep Diver chances 70% dirt, 30% crude
- Shellfish at Galley now Happy: 9 Nourish: 18 Hunger: 9
- Trapper has 20% chance to add Shellfish in trap while city is moving (previously 0%)
- Unfueled motors will give 15% of rated thrust to city movement
- French translation updated
- Population growth bar

Bugs Fixed:
- Crab icon has small red border
- Zooming hotkey rebinds not working
- Resource demands not depleted from UI or wrong resource displayed
- Demands not using wanted resources
- Hostiles attacking eachother
- Evaporator not in "Production" tab filter
- Task priority not saving
- Guardhouse position error
- Building disconnection sometimes not happening
- Navigation breaking if path is too complex (during extreme bridge-defense bases)
- City movement Speed colors displaying incorrectly
- Galley trying to refill food after destruction and causing errors
- Sunken brewery, Bioalgae wrong tooltip for Do Nothing choice
- Towers stealing all the metal (again)
- Smart delivery ignoring Construction sites if Construction task is higher priority
- Explosion particle and light from ambushed boat not going away
- Ambushed Wavebreaker ship choices UI not closing in certain situations
- Sickness choice spam reduced if doctors were sent
- Trade caravan resource more/less exploit
- Doctor healing only 1 villager
+ Removed Martin