Fixed #5213 (add "bottom-toolbar" class to bottom toolbar).
Fixed #5213 (add "bottom-toolbar" class to bottom toolbar).

abrauchli/shotwell,damianmoore/shotwell,abrauchli/shotwell,polymeris/shotwell,jimbonator/shotwell,ritchiewilson/shotwell,jimbonator/shotwell,abrauchli/shotwell,damianmoore/shotwell,ritchiewilson/shotwell,polymeris/shotwell,ritchiewilson/shotwell,polymeris/shotwell,damianmoore/shotwell,jimbonator/shotwell