[FEATURE] Toggle extended configuration options

To enable a simple interface but more options for the
experienced developer there is an advancedMode which
toggles additional options in the interface

Access key is "a"

Also removes 3 Javascript files that were not used

Releases: 6.2
Resolves: #57423

Change-Id: I4a965fa1599affd864e498c74f418e607191bbfe
Reviewed-on: https://review.typo3.org/28946
Reviewed-by: Nico de Haen
Tested-by: Nico de Haen