Fix a logical error as force anonymous gadget is usable with anonymous users only.
"Add Gadgets" block was not show properly so fix it.
also copy payment requests when creating a reversal transaction
use sRGB colorspace instead of RGB in image conversion.

> Note, ImageMagick assumes the sRGB colorspace if the image format does not indicate otherwise.
http://www.imagemagick.org/script/command-line-options.php#colorspace
If original format is matched or format is empty string return original content of PDF document.
Adjust test accordingly and fix bad test.
Merge branch 'master' into ivan_dms