Bugs and balance patch

Bug fix updates are slowing down as it's taking increasing effort to find bugs that are less severe. I'll keep looking for bugs as I find them but I'm going to start to transition to improving melee combat and adding enemy cities.

1. Fix text display for number of units you will bring with you on suicide missions not accounting for leadership bonuses due to rings or amulets
2. Fix units trying to walk up 2 meter walls in the dungeon
3. Reduce player damage inflation at high levels. Player's base damage gain per level reduced, and headhunter especially reduced. However, base bow damage is increased. Headshot bonus damage decreased to 1.33 times but this can be improved with the head hunter ability.
4. Improved mage light bounce
5. Improve mana bolt particle effect fade out
6. Increase Ability_HeadHunter_SuccessiveHeadshotTimeout from 6 to 7
7. Fix waiting hall room floating objects when table destroyed
8. Fix units that move to a particular point to cast spells, such as summoning units, just standing around if their attack target is not in front of them and they are not already at the destination point
9. Disable lower edge colliders from dungeon walls to prevent units from standing on top of them
10. Fix stuck unit in linear mission 1
11. Fix linear mission 1 boss (Lazo) being much easier than intended
12. Zombie slow now slows down targets from 1/2 speed to 1/3 the speed, so you can't just run away and negate the effect
13. Increase the time blood decals last to 45 seconds from 15 seconds
14. Add additional logging to try to find out why the player sometimes shoots up into the air when dodging or possibly jumping while near a wall
15. Fix 2 pillars with no colliders in DungeonTile_Stairs
16. Fix flee decision causing AI to enter fear state when spawning with the map having AI they can't see
17. Further buff mage light for long distances
18. Fix volatile ether shooting through enemies and increase knockdown effect
19. Update DunGen to 2.13.4 released March 2, 2021
20. Previously all bows would slow enemies, now only the leeching bow does so
21. If the player somehow falls through the floor, put him back on the ground