Always upscale screenshots if they are too small
Always upscale screenshots if they are too small

After discussing screenshot scaling with jimmac, the designer guidance
was that slightly blurry, upscaled images look better than unscaled
images that have uneven weird borders.

ikeydoherty/appstream-glib,kalev/appstream-glib,mitya57/appstream-glib,mitya57/appstream-glib,superm1/appstream-glib,ximion/appstream-glib,superm1/appstream-glib,kalev/appstream-glib,hughsie/appstream-glib,ximion/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,ikeydoherty/appstream-glib,hughsie/appstream-glib