[!!!][TASK] Move Content Object IMGTEXT to compatibility6

The predecessor of css styled content-based
text w/ image, called IMGTEXT, is moved to
compatibility6.

The only place where it is used when it is called
directly (page.10 = IMGTEXT), and specifically
requested within CSS Styled Content in
renderTextpic() if ".renderMethod" is empty or
explicitly set to "table".

Releases: master
Resolves: #64671
Change-Id: I3b56ac9b044adfaa4295a3d54070187e14caf576
Reviewed-on: http://review.typo3.org/36484


Reviewed-by: Jan Helke <typo3@helke.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Göran Bodenschatz <coding@46halbe.de>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>