fixes #1428 use typographic right arrow in welcome dialog
fixes #1428 use typographic right arrow in welcome dialog

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