Display conditions - Implemented most of static input

src/Artemis.UI/Events/MainWindowKeyEvent.cs

@@ -4,12 +4,14 @@ namespace Artemis.UI.Events
 {
     public class MainWindowKeyEvent
     {
-        public MainWindowKeyEvent(bool keyDown, KeyEventArgs eventArgs)
+        public MainWindowKeyEvent(object sender, bool keyDown, KeyEventArgs eventArgs)
         {
+            Sender = sender;
             KeyDown = keyDown;
             EventArgs = eventArgs;
         }
 
+        public object Sender { get; }
         public bool KeyDown { get; }
         public KeyEventArgs EventArgs { get; }
     }