Code review comment for lp:~l-admin-3/gala/workspace-switcher-background-setting

I have pushed r421. There you can see how it works while looking at @GETTEXT_PACKAGE@

As the fallback check I would prefer a simple file-existence check (and *maybe* combined with a mime-type check to make sure it is an image-file)

Use any other text-editor to avoid stripping the file-ending ;)

Please rebase your work on latest trunk (squashed into on commit)