Fix: Collage not working when calligra or inkscape used.
Ver: 1.6, gimp backend, progress bar.
FIX: vector image ignores resize if percentage selected

The image was resized to half resolution and then resized again
by imagemagick. All images from inkscape are appended in the tail
getting the total minus inkscape files gave us a cue to set resize to
none and avoid resizing twice.
Merge branch 'dev'