feat: allow null in keybindings

pkg/gui/keybindings/keybindings.go

@@ -179,6 +179,5 @@ func GetKey(key string) types.Key {
 	} else if runeCount == 1 {
 		return []rune(key)[0]
 	}
-	log.Fatal("Key empty for keybinding: " + strings.ToLower(key))
 	return nil
 }

pkg/gui/options_menu_panel.go

@@ -58,7 +58,7 @@ func (gui *Gui) handleCreateOptionsMenu() error {
 			OpensMenu: binding.OpensMenu,
 			Label:     binding.Description,
 			OnPress: func() error {
-				if binding.Key == nil {
+				if binding.Handler == nil {
 					return nil
 				}