Closes #3579.
Closes #3579.

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