Fixing the ComboBox OnEnter.

Terminal.Gui/Views/ComboBox.cs

@@ -184,7 +184,7 @@ namespace Terminal.Gui {
 		}
 
 		///<inheritdoc/>
-		public override bool OnEnter ()
+		public override bool OnEnter (View view)
 		{
 			if (!search.HasFocus)
 				this.SetFocus (search);