* [#4126] Fixed incorrect validation of components inside repeating groups that are
  conditionally visible (with frontend logic).
* [#4134] Fixed form designer admin crashes when component/variable keys are edited.
* [#4131] Fixed bug where component validators all had to be valid rather than at least
  one.
* [#4140] Added deploy configuration parameter to not send hidden field values to the
  Objects API during registration, restoring the old behaviour. Note that this is a
  workaround and the correct behaviour (see ticket #3890) will be enforced from Open
  Forms 2.7.0 and newer.
* [#4072] Fixed not being able to enter an MFA recovery token.
* [#4143] Added additional backend validation: now when form step data is being saved (
  including pausing a form), the values are validated against the component
  configuration too.
* [#4145] Fixed the payment status not being registered correctly for StUF-ZDS.