[BUGFIX] Reset click events in buttons of MultiStepWizard

When the MultiStepWizard is used with additional click events bound to
the next or prev button, those event got stacked as the buttons don't
change per step.

To fix this issue, all click events are removed after switching a step
and the original click event to switch the step is bound again.

Furthermore the 'savePath' for duplication of a form is now correctly
set if there is only one folder available and therefore no select element
present in the modal.

Resolves: #91094
Releases: master
Change-Id: Ic95d2222441c8e1e8cf9fb46e5e7437d4e4ed85e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64214


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Eßl <indy.essl@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Eßl <indy.essl@gmail.com>