[BUGFIX] EXT:form - Bring back view specific layout settings

The issue #31951 introduced a solution for view specific layout settings
(for the form and the confirmation page). This patchset restores the
functionality and also allows a differing layout for the post processor/
mail. Furthermore it supports the extraordinary layout settings of
EXT:bootstrape_package which introduced some edge cases while changing
radiogroups and checkboxgroups.

Resolves: #70086
Releases: master
Change-Id: Ic8d1075e535a5ad7528ff53ddcf0daa44408d53d
Reviewed-on: http://review.typo3.org/43533


Tested-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>