KDE Neon System Settings Workspace Theme Picker Missing

sudo apt update
sudo apt dist-upgrade
sudo apt install qml-module-org-kde-kcm

Source: https://muhdzamri.blogspot.tw/2018/01/problem-with-kde-look-and-feel-and.html

More info:

# apt show qml-module-org-kde-kcm
Package: qml-module-org-kde-kcm
Version: 5.42.0-0neon+16.04+xenial+build54
Priority: optional
Section: libs
Source: kdeclarative
Maintainer: Neon CI <[email protected]>
Installed-Size: 63.5 kB
Depends: libkf5declarative5 (>= 5.42.0-0neon+16.04+xenial+build54), qml-module-org-kde-kirigami2, libc6 (>= 2.14), libkf5quickaddons5, libqt5core5a (>= 5.9.3+dfsg), libqt5qml5 (>= 5.9.3), libstdc++6 (>= 4.1.1)
Homepage: https://projects.kde.org/projects/frameworks/kdeclarative
Download-Size: 15.6 kB
APT-Manual-Installed: yes
APT-Sources: http://archive.neon.kde.org/user xenial/main amd64 Packages
Description: provides integration of QML and KDE Frameworks - kconfig
 This import contains KDE extras that are visually similar to Qt Quick
 Controls.
 .
 This package contains the QML files used by libkf5declarative.