Metadata viewer: indicate that the focal length is given in milimeters
Metadata viewer: don't display invalid/unusable "focus distance" values
Update Polish translation
Merge pull request #251 from jktjkt/metadata-viewer-tweaks

Metadata viewer tweaks
Merge pull request #256 from adsr303/plpo

Update Polish translation
partially revert commit 335d82bf3d2fb8309e6d9a7e0627f59acdb8bff0
[l10n] Swedish update: 2 fuzzies cleared
noise profile: nikon coolpix p330 by joe.