lens iop: Automatically set scale.
Improve filter on import

Instead of showing all images, we set the filter to the smaller of the
default import rating and the current filter. This ensures that the
imported images are shown, but that we don't reduce the filter
unnecessarily.
Update comments for improved import filter handling
Keep old import filter reset for collect operations
Danish translation: Better translation for lossy/lossless
Merge remote-tracking branch 'upstream/master'
Danish translation: Better translations of some strings
Update French translation.
Merge remote-tracking branch 'upstream/master'
Updated Danish translation
Merge pull request #341 from pryds/master

Updated Danish translation
Italian translation updated
Merge pull request #342 from bartokk/master

Italian translation updated
collect: Improve tag mode a bit

- Allow translation of "uncategorized"
- Get rid of some GTK warnings
- Don't remove subtrees not matching, just collapse them so it's easy to
  click around
Update French translation.
Mark a local helper function static
Fix missing format tags for images with XMP

The problem is that we now go through some strange duplicate detection
code which re-reads the xmp file, which in turn removes the format tags
again since these are not stored in the xmp. For now I removed removal
of old metadata when reading an xmp file. I am neither sure if it was the
wisest choice to do so in the first place nor if this is any better. But
at least the tags work again.
Make blacklevel of exposure more precise

... by going from 3 to 4 digits after the dot. This was a user request
that Henrik and me approved.
[l10n] Update German translation
Fix #9563 Use a lock file for the database

The old hack by using sqlite locking seems to no longer work with newer
sqlite releases. So let's change to lock files.