Settings - Update Repair & Trench settings

[Mike-MF]

• Reverted the 0.6 AI damage, shouldn't be necessary anymore.

Trench Stuff: Me and Mick have been balancing out trenches trying to move us away from digging sandcastles everywhere we go.

• Removed the largest
• Readded the smallest
• Set the times to be 2 minutes, 4 minutes & 8 minutes, obviously scales down with amount of players helping.

Repair Stuff: Coordinated with Mick & Alan

• Sets up a reasonable full repair timer, nearly 7 minutes for a vehicle at 50% is insane.
• Lowers the wheel patching from 70% to 50% otherwise spare wheels are only useful for direct replacement of a destroyed one.