[BUGFIX] Streamline EXT:fluid_styled_content typoscript

Change-Id: I72b04a79f0ed36a3156d329bd071b84c54bbbfa0
Resolves: #70312
Releases: master
Reviewed-on: http://review.typo3.org/43745


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>