raw NEF thumbnails not processed

Raw NEF thumbnails are not displayed in Nautilus.

FIX

Add missing mime types to /usr/share/thumbnailers/gdk-pixbuf-thumbnailer.thumbnailer

This is described here https://askubuntu.com/questions/283072/nautilus-isnt-displaying-thumbnails-for-my-nef-files-photo-raw

RAW mime types to add: image/x-3fr;image/x-adobe-dng;image/x-arw;image/x-bay;image/x-canon-cr2;image/x-canon-crw;image/x-cap;image/x-cr2;image/x-crw;image/x-dcr;image/x-dcraw;image/x-dcs;image/x-dng;image/x-drf;image/x-eip;image/x-erf;image/x-fff;image/x-fuji-raf;image/x-iiq;image/x-k25;image/x-kdc;image/x-mef;image/x-minolta-mrw;image/x-mos;image/x-mrw;image/x-nef;image/x-nikon-nef;image/x-nrw;image/x-olympus-orf;image/x-orf;image/x-panasonic-raw;image/x-panasonic-raw2;image/x-pef;image/x-pentax-pef;image/x-ptx;image/x-pxn;image/x-r3d;image/x-raf;image/x-raw;image/x-rw2;image/x-rwl;image/x-rwz;image/x-samsung-srw;image/x-sigma-x3f;image/x-sony-arw;image/x-sony-sr2;image/x-sony-srf;image/x-sr2;image/x-srf;image/x-x3f;

Please consider changing the thumbnailer conifg so it will work out of the box.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: libgdk-pixbuf2.0-bin 2.40.0+dfsg-3 [modified: usr/share/thumbnailers/gdk-pixbuf-thumbnailer.thumbnailer]
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue May 19 12:48:25 2020
InstallationDate: Installed on 2020-05-11 (7 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: gdk-pixbuf
UpgradeStatus: No upgrade log present (probably fresh install)