Add Alt-click functionality (#4497)

* Fix ItemSlot Bug

* Add Alt-use Key

* Fix TransferAmount window bug

* Alt-click functionality

* Added AltInteract verbs

* Add new verbs

* verb icons

* Changed Comments

* Change Comments

* Fix disposal verbs

* Changed Get...() to Get...OrNull()

* Changed alt-interact combat behaviour

* Update verb icons

* Inventory interact event

* Add Alt+E secondary binding

* Add alt-z keybinding

* Rename AltUse -> AltActivateItemInWorld

Content.Client/Chemistry/UI/TransferAmountBoundUserInterface.cs

@@ -1,4 +1,4 @@
-using Content.Shared.Chemistry;
+using Content.Shared.Chemistry;
 using Content.Shared.Chemistry.Reagent;
 using JetBrains.Annotations;
 using Robust.Client.GameObjects;
@@ -24,7 +24,7 @@ namespace Content.Client.Chemistry.UI
                     _window.Close();
                 }
             };
-
+            _window.OnClose += Close;
             _window.OpenCentered();
         }