[TASK] Load Page TSconfig of fluid_styled_content per default

Load the "New Content Element Wizard" Page TSconfig of the
fluid_styled_content extension by default.
To prevent the autoloading of the TSConfig an extension
configuration is added.
The same option is added for css_styled_content to prevent
the autoloading of the Page TSconfig.

Resolves: #70162
Releases: master
Change-Id: Ie898eba92836681631274251cd0010ad4c8470a2
Reviewed-on: http://review.typo3.org/43616


Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>