Updates various systems to the new InputCommandHandler delegate signature, implementing the new handled return value.

Modifies the construction system to use the newer InputHandler system, instead of the older ClickComponent system.
Updates the engine submodule.

Content.Server/GameObjects/EntitySystems/HandsSystem.cs

@@ -97,18 +97,18 @@ namespace Content.Server.GameObjects.EntitySystems
             handsComp.SwapHands();
         }
 
-        private void HandleDrop(ICommonSession session, GridCoordinates coords, EntityUid uid)
+        private bool HandleDrop(ICommonSession session, GridCoordinates coords, EntityUid uid)
         {
             var ent = ((IPlayerSession) session).AttachedEntity;
 
             if (ent == null || !ent.IsValid())
             {
-                return;
+                return false;
             }
 
             if (!ent.TryGetComponent(out HandsComponent handsComp))
             {
-                return;
+                return false;
             }
 
             if (coords.InRange(_mapManager, ent.Transform.GridPosition, InteractionSystem.InteractionRange))
@@ -119,6 +119,8 @@ namespace Content.Server.GameObjects.EntitySystems
             {
                 handsComp.Drop(handsComp.ActiveIndex);
             }
+
+            return true;
         }
 
         private static void HandleActivateItem(ICommonSession session)
@@ -129,23 +131,23 @@ namespace Content.Server.GameObjects.EntitySystems
             handsComp.ActivateItem();
         }
 
-        private void HandleThrowItem(ICommonSession session, GridCoordinates coords, EntityUid uid)
+        private bool HandleThrowItem(ICommonSession session, GridCoordinates coords, EntityUid uid)
         {
             var plyEnt = ((IPlayerSession)session).AttachedEntity;
 
             if (plyEnt == null || !plyEnt.IsValid())
-                return;
+                return false;
 
             if (!plyEnt.TryGetComponent(out HandsComponent handsComp))
-                return;
+                return false;
 
             if (!handsComp.CanDrop(handsComp.ActiveIndex))
-                return;
+                return false;
 
             var throwEnt = handsComp.GetHand(handsComp.ActiveIndex).Owner;
 
             if (!handsComp.ThrowItem())
-                return;
+                return false;
 
             // pop off an item, or throw the single item in hand.
             if (!throwEnt.TryGetComponent(out StackComponent stackComp) || stackComp.Count < 2)
@@ -163,7 +165,7 @@ namespace Content.Server.GameObjects.EntitySystems
             }
 
             if (!throwEnt.TryGetComponent(out CollidableComponent colComp))
-                return;
+                return true;
 
             colComp.CollisionEnabled = true;
             // I can now collide with player, so that i can do damage.
@@ -203,7 +205,7 @@ namespace Content.Server.GameObjects.EntitySystems
             lHomoDir.Normalize();
             transform.LocalRotation = new Angle(lHomoDir.Xy);
 
-
+            return true;
         }
     }
 }