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.Client/GameObjects/EntitySystems/ConstructorSystem.cs

@@ -1,4 +1,4 @@
-using Content.Client.Construction;
+using Content.Client.Construction;
 using Content.Client.GameObjects.Components.Construction;
 using Content.Client.UserInterface;
 using Content.Shared.Input;
@@ -6,6 +6,7 @@ using Robust.Client.GameObjects.EntitySystems;
 using Robust.Client.Player;
 using Robust.Shared.GameObjects.Systems;
 using Robust.Shared.Input;
+using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.IoC;
 
 namespace Content.Client.GameObjects.EntitySystems
@@ -15,6 +16,7 @@ namespace Content.Client.GameObjects.EntitySystems
 #pragma warning disable 649
         [Dependency] private readonly IGameHud _gameHud;
         [Dependency] private readonly IPlayerManager _playerManager;
+        [Dependency] private readonly IEntityManager _entityManager;
 #pragma warning restore 649
 
         public override void Initialize()
@@ -24,14 +26,17 @@ namespace Content.Client.GameObjects.EntitySystems
             var inputSys = EntitySystemManager.GetEntitySystem<InputSystem>();
             inputSys.BindMap.BindFunction(ContentKeyFunctions.OpenCraftingMenu,
                 new PointerInputCmdHandler(HandleOpenCraftingMenu));
+
+            inputSys.BindMap.BindFunction(EngineKeyFunctions.Use,
+                new PointerInputCmdHandler(HandleUse));
         }
 
-        private void HandleOpenCraftingMenu(in PointerInputCmdHandler.PointerInputCmdArgs args)
+        private bool HandleOpenCraftingMenu(in PointerInputCmdHandler.PointerInputCmdArgs args)
         {
             if (_playerManager.LocalPlayer.ControlledEntity == null
                 || !_playerManager.LocalPlayer.ControlledEntity.TryGetComponent(out ConstructorComponent constructor))
             {
-                return;
+                return false;
             }
 
             var menu = constructor.ConstructionMenu;
@@ -51,6 +56,23 @@ namespace Content.Client.GameObjects.EntitySystems
             {
                 _setOpenValue(menu, true);
             }
+
+            return true;
+        }
+
+        private bool HandleUse(in PointerInputCmdHandler.PointerInputCmdArgs args)
+        {
+            if (!args.EntityUid.IsValid() || !args.EntityUid.IsClientSide())
+                return false;
+
+            var entity = _entityManager.GetEntity(args.EntityUid);
+
+            if (!entity.TryGetComponent(out ConstructionGhostComponent ghostComp))
+                return false;
+
+            ghostComp.Master.TryStartConstruction(ghostComp.GhostID);
+            return true;
+
         }
 
         private void _setOpenValue(ConstructionMenu menu, bool value)