Add KeyShortcutHandler to every NAT UI, KeyShortcutSystem

projects/nat-archive-tool/src/nat/ArchiveUI.hx

@@ -1,6 +1,8 @@
 package nat;
 
+import nat.Entry;
 import nat.ArchiveController;
+import kiss_tools.KeyShortcutHandler;
 
 interface ArchiveUI {
     /**
@@ -8,6 +10,11 @@ interface ArchiveUI {
      */
     var controller(default, default):ArchiveController;
 
+    /**
+     * A KeyShortcutHandler that will integrate with the KeyShortcutSystem if provided
+     */
+    var shortcutHandler(default, null):Null<KeyShortcutHandler<Entry>>;
+
     /**
      * Prompt the user to enter text
      */