Day button in gnome-weather is insensitive (colour does not change)

[Amr Ibrahim]

Steps:

1. Install and open gnome-weather
2. Select a location or let it find one
3. Switch between Today and Tomorrow
4. No change in the colour of the button

The colour of the button should change to indicate which day is selected.
See screenshot.
This does not happen in Adwaita.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: light-themes 16.10+17.10.20170918-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 25 18:53:20 2017
InstallationDate: Installed on 2017-09-21 (4 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170919)
PackageArchitecture: all
SourcePackage: ubuntu-themes
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.