[BUGFIX] Visible notification if cropping has changed

For all formfields there is a visible notification (blue border)
for when value has been changed. This is now also visible for 
the preview image if the cropping has been changed.

Resolves: #66442
Releases: master
Change-Id: I0a089687b8641732076c302f43f9d8a5e7a671ab
Reviewed-on: http://review.typo3.org/38716


Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Andreas Fernandez <andreas.fernandez@aspedia.de>
Tested-by: Andreas Fernandez <andreas.fernandez@aspedia.de>