Some main menu fixes

App/KeyboardShortcuts.swift

@@ -49,6 +49,15 @@ protocol ShortcutResponder: AnyObject {
     optional func toggleDarkMode(_ sender: Any?)
 }
 
+fileprivate extension Array {
+    func removeNulls() -> Array {
+        self.filter { element in
+            guard let keyCommand = element as? UIKeyCommand else { return true }
+            return !keyCommand.isNull()
+        }
+    }
+}
+
 public class KeyboardShortcuts {
     public enum Category: CaseIterable {
         case application
@@ -121,7 +130,7 @@ public class KeyboardShortcuts {
                         action: #selector(ShortcutResponder.stop)
                     )
                 ]),
-            ]
+            ].removeNulls()
             
         case .go:
             return [