All options in dropdowns look like disabled when they are not

[teo1978]

Steps to reproduce:
- do anything that opens a dialog that contains dropdowns (examples: Image->canvas size; Image->print size)
- click on a dropdown to unfold it (example: "resize layers" option in Canvas Size, or "unit" in "print size")

Expected: the dropdown should have a normal appearance, and options that are not disabled for some reason, should have a normal contrast of color text vs background color, e.g. almost white over dark grey given that dark grey is the usual background color for dropdowns

Observed: the dropdowns look like all the options (except the one you are selecting) are disabled. They are barely readable, in less-dark grey text over darker-grey background. It's pathetic.

I don't know if you are going to tell me to report this upstream, but if I do, they'll certainly tell me that I'm using an obsolete version and to report it to the distribution maintainers.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gimp 2.8.16-1ubuntu1.1
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Apr 7 15:50:48 2018
InstallationDate: Installed on 2013-10-11 (1638 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: gimp
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

Ubuntu 16.04 (xenial) reached end-of-standard-support on April 29, 2021.
Reporter no longer uses Launchpad
Issue not confirmed by another user so closing.