#342: Fixes assertion crash where item was not selected on mouse-up due to unimplemented modifier key.
#342: Fixes assertion crash where item was not selected on mouse-up due to unimplemented modifier key.


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