Bunch of crew AI bugfixes/improvements:

- replacing empty oxygen tanks
- fixed characters only fixing leaks in the outer hull
- prioritizing large leaks over small ones
- fixed characters doing nothing after fixing all the leaks (and sinking to the bottom if they happen to be outside)
- more accurate welder aiming
- AIObjectiveGetItem makes the characters go to the cabinet/container an item is inside, not to the actual item (which may not be actually positioned at the container)

Subsurface/Source/Items/Components/Projectile.cs

@@ -171,7 +171,7 @@ namespace Barotrauma.Items.Components
                 }
             }
 
-            ApplyStatusEffects(ActionType.OnUse, 1.0f, null);
+            ApplyStatusEffects(ActionType.OnUse, 1.0f);
 
             item.body.FarseerBody.OnCollision -= OnProjectileCollision;