Add filemanager button to show non-hovered image overlays
Merge pull request #470 from kriomant/nonhovered-image-status

Add filemanager button to show non-hovered image statuses
Only -1 returned by open() means "unsuccessful completion"
Coverity CID 1034535, CID 1127333
Merge branch 'master' of https://github.com/darktable-org/darktable
We will leak descriptor after goto
Coverity CID 1127332, CID 1127333
Use unmodified width/height orientation.
Merge branch 'master' of https://github.com/darktable-org/darktable