Keybind to stop pulling. (#2094)

* keybind to stop pulling.

* smug

Content.Client/UserInterface/TutorialWindow.cs

@@ -83,6 +83,7 @@ Use targeted entity: [color=#a4885c]{11}[/color]
 Throw held item: [color=#a4885c]{12}[/color]
 Pull entity: [color=#a4885c]{30}[/color]
 Move pulled entity: [color=#a4885c]{29}[/color]
+Stop pulling: [color=#a4885c]{32}[/color]
 Examine entity: [color=#a4885c]{13}[/color]
 Point somewhere: [color=#a4885c]{28}[/color]
 Open entity context menu: [color=#a4885c]{14}[/color]
@@ -122,7 +123,8 @@ Toggle admin menu [color=#a4885c]{31}[/color]",
                 Key(Point),
                 Key(TryPullObject),
                 Key(MovePulledObject),
-                Key(OpenAdminMenu)));
+                Key(OpenAdminMenu),
+                Key(ReleasePulledObject)));
 
             //Gameplay
             VBox.AddChild(new Label { FontOverride = headerFont, Text = "\nGameplay" });