Closes #4599, closes #4597, use the raw dimensions as a starting point when computing the after-pipeline dimensions.
Closes #4599, closes #4597, use the raw dimensions as a starting point when computing the after-pipeline dimensions.

Sanva/shotwell-gsoc,Sanva/shotwell-gsoc,Sanva/shotwell-gsoc,jimbonator/shotwell,ritchiewilson/shotwell,jimbonator/shotwell,abrauchli/shotwell,abrauchli/shotwell,damianmoore/shotwell,h4ck3rm1k3/shotwell,abrauchli/shotwell,h4ck3rm1k3/shotwell,damianmoore/shotwell,jimbonator/shotwell,polymeris/shotwell,polymeris/shotwell,ritchiewilson/shotwell,ritchiewilson/shotwell,h4ck3rm1k3/shotwell,polymeris/shotwell,damianmoore/shotwell