[BUGFIX] Fix image adding in RTE

Due to the {moduleUrl} being placed within some JavaScript there seems to be a
problem with replacing that placeholder inside the Show.html template of
ImageEditor.

Another problem is that the createAction() of ProcessedFileController didn't
respect processing information that was passed to it.

Change-Id: Iac29d8645f155dc2360cff86541f337eb9c6580a
Fixes: #60104
Reviewed-on: https://review.typo3.org/31324
Reviewed-by: Fabien Udriot
Tested-by: Fabien Udriot