Fixes a bug in which some publishing operations would continue even after the user had cancelled publishing. Closes #3472.
Fixes a bug in which some publishing operations would continue even after the user had cancelled publishing. Closes #3472.


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