Fixed IsKeyHit (ladder climbing being inconsistent) + optimized interaction syncing

Instead of sending over mouse position as two floats (8 bytes total), the game will send the aim angle represented as a short (0 to 65535, so it's fairly precise) and the selected item ID (up to 4 bytes total, 2 bytes if it's only one of the inputs).

The problem with IsKeyHit is that it checked when the player started a key press, when it should've been checking for the key being released.

Subsurface/Source/Characters/Animation/HumanoidAnimController.cs

@@ -832,7 +832,7 @@ namespace Barotrauma
             trigger = character.SelectedConstruction.TransformTrigger(trigger);
 
             bool notClimbing = false;
-            if (character.IsRemotePlayer)
+            if (character.IsRemotePlayer && GameMain.Server == null)
             {
                 notClimbing = character.IsKeyDown(InputType.Left) || character.IsKeyDown(InputType.Right);
             }

Subsurface/Source/Characters/Animation/Ragdoll.cs

@@ -1285,7 +1285,6 @@ namespace Barotrauma
                     Vector2 positionError = serverPos.Position - localPos.Position;
 
                     float errorMagnitude = positionError.Length();
-                    DebugConsole.NewMessage(positionError.X.ToString()+" "+positionError.Y.ToString(),Color.Red);
 
                     /*if (errorMagnitude > 8.0f)
                     {