Fixed some inconsistencies and oddities in physics-handling code

I'm not sure if this fixes or breaks anything, but it's worth a shot.

Barotrauma/BarotraumaShared/Source/Characters/Animation/FishAnimController.cs

@@ -78,7 +78,7 @@ namespace Barotrauma
             }
 
             //re-enable collider
-            if (!Collider.FarseerBody.Enabled)
+            if (!Collider.Enabled)
             {
                 var lowestLimb = FindLowestLimb();
 
@@ -87,7 +87,7 @@ namespace Barotrauma
                     Math.Max(lowestLimb.SimPosition.Y + (Collider.radius + Collider.height / 2), Collider.SimPosition.Y)),
                     0.0f);
 
-                Collider.FarseerBody.Enabled = true;
+                Collider.Enabled = true;
             }
 
             ResetPullJoints();

Barotrauma/BarotraumaShared/Source/Characters/Animation/HumanoidAnimController.cs

@@ -104,7 +104,7 @@ namespace Barotrauma
 
 
             //re-enable collider
-            if (!Collider.FarseerBody.Enabled)
+            if (!Collider.Enabled)
             {
                 var lowestLimb = FindLowestLimb();
                 
@@ -114,7 +114,7 @@ namespace Barotrauma
                     Collider.Rotation);
                 
                 Collider.FarseerBody.ResetDynamics();
-                Collider.FarseerBody.Enabled = true;
+                Collider.Enabled = true;
             }            
 
             if (swimming)

Barotrauma/BarotraumaShared/Source/Characters/Animation/Ragdoll.cs

@@ -1469,5 +1469,12 @@ namespace Barotrauma
             list.Remove(this);
         }
 
+        public static void RemoveAll()
+        {
+            for (int i = list.Count - 1; i >= 0; i--)
+            {
+                list[i].Remove();
+            }
+        }
     }
 }