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.Server/Cabinet/ItemCabinetComponent.cs

@@ -75,6 +75,11 @@ namespace Content.Server.Cabinet
         [Verb]
         public sealed class ToggleItemCabinetVerb : Verb<ItemCabinetComponent>
         {
+            // Unlike lockers, you cannot open/close cabinets by clicking on them, as this usually removes their item
+            // instead. So open/close is the alt-interact verb
+
+            public override bool AlternativeInteraction => true;
+
             protected override void GetData(IEntity user, ItemCabinetComponent component, VerbData data)
             {
                 if (!EntitySystem.Get<ActionBlockerSystem>().CanInteract(user))