Revert "update to follow PR suggestions"

This reverts commit dc02990.

app/app_xdg.go

@@ -62,12 +62,15 @@ func findFreedestktopColorScheme() fyne.ThemeVariant {
 	// 0: No preference
 	// 1: Prefer dark appearance
 	// 2: Prefer light appearance
-	if value == 1 {
+	switch value {
+	case 2:
+		return theme.VariantLight
+	case 1:
 		return theme.VariantDark
+	default:
+		// Default to light theme to support Gnome's default see https://github.com/fyne-io/fyne/pull/3561
+		return theme.VariantLight
 	}
-
-	// Default to light theme for 0, 2 and unknown values to support Gnome's default see https://github.com/fyne-io/fyne/pull/3561
-	return theme.VariantLight
 }
 
 func (a *fyneApp) SendNotification(n *fyne.Notification) {