[TASK] Move tt_content.image_frames to compatibility6

The field "image_frames" which was disabled by
css_styled_content since TYPO3 4.x by default is
moved to EXT:compatibility6 - but also disabled
by default.

Resolves: #67648
Releases: master
Change-Id: I48310873499f5d5fd647a7d729d0ecc7247efde7
Reviewed-on: http://review.typo3.org/40489


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>