fix(snackbar): ensure snackbar does not persist after action

Author: gokadzev

lib/widgets/lockin_snackbar.dart

@@ -31,6 +31,7 @@ class LockinSnackBar {
         SnackBar(
           content: Text(message),
           duration: duration,
+          persist: false,
           action: SnackBarAction(label: undoLabel, onPressed: onUndo),
         ),
       );