exif: always try to use Exiv2's lens detection for Olympus

Example:
Exif.OlympusEq.LensType                      Byte        6  Olympus Zuiko Digital ED 14-42mm F3.5-5.6
Exif.OlympusEq.LensModel                     Ascii      32  OLYMPUS 14-42mm Lens

The lensfun-0.3.0 database has been cleaned up and has proper matches to LensType
The lensfun-0.2.8 database has something that looks like LensModel, but not quite.

LensModel is very ambiguous in any case and thus probably shouldn't be used in any case.

Particularly when taking in account metadata is read at import time, it makes a lot of sense
to use the most "future-proof" option, which will be LensType.

Relevant commits:
eee664223f7eff916b3f6a6d92a6d2f305c9d097
e710949c915a0f2476d4cb3fbdea9e90af69d074
09bac2436d5cbbc13e71ad8649394bada005a53f

(cherry picked from commit 09ea65d7c041f6f6a0cda719c115d77c21570dac)
noise profile: fuji x100 by captain siff

(cherry picked from commit 69cd74636d9e7bab95641d81221c8d99474b6457)
basecurve: cleanup table layout butched by clang-format

(cherry picked from commit 76e3a299c2ee7c4f41af73d81b731175ac4558a7)
Graduatednd IOP: avoid rounding issues for rotation after moving whole line. Fixes #10241

(cherry picked from commit 92914ef17be6ba3875b7f0260cf02fd2754cdc91)
[l10n] Update German translation
Pick 2 translations from master

Sorry for any inconvenience dear French translator, just revert the file
locally if you have to merge local changes. It's copy&paste from master.
Merge remote-tracking branch 'upstream/darktable-1.6.x' into darktable-1.6.x
Updated Catalan translation