REGRESSION: kwin does not reactivate laptop monitor when external monitor is detached

https://bugreports.qt.io/browse/QTBUG-42985

Also some changes were made in Kernel 4.4.RC1:
http://lkml.iu.edu/hypermail/linux/kernel/1511.1/01884.html

Which will hopefully be backported by the Kernel-Team...

Boris Barbulovski (38):
      Remove support for QT3 and older.
      Port xconfig to Qt5 - Use QMainWindow, QToolBar
      Port xconfig to Qt5 - Use QAction
      Port xconfig to Qt5 - Use QFileDialog
      Port xconfig to Qt5 - Use QList
      Port xconfig to Qt5 - Use QTextBrowser
      Port xconfig to Qt5 - Use QMenu
      Port xconfig to Qt5 - Remove unused #include <q3dragobject.h>
      Port xconfig to Qt5 - Replace Q3VBox with QWidget
      Port xconfig to Qt5 - Fix layout
      Port xconfig to Qt5 - Fix layout margin.
      Port xconfig to Qt5 - Update QAction checkable
      Port xconfig to Qt5 - Make single/split/full actions checkable.
      Port xconfig to Qt5 - Remove custom ListView classes.
      Port xconfig to Qt5 - Fix the code so it compiles with Qt5
      Port xconfig to Qt5 - update signals
      Port xconfig to Qt5 - Introduce Qt4/5 version of ConfigList and ConfigItem
      Port xconfig to Qt5 - Put back some of the old implementation.
      Port xconfig to Qt5 - Put back some of the old implementation(part 2).
      Port xconfig to Qt5 - Remove Qt3Support from Makefile.
      Port xconfig to Qt5 - Use correct signal names.
      Port xconfig to Qt5 - Set ConfigView object name.
      Port xconfig to Qt5 - Quick workaround to bypass app crash at startup.
      Port xconfig to Qt5 - Tree widget set column titles.
      Port xconfig to Qt5 - Add ConfigItem::nextItem to initializer list.
      Port xconfig to Qt5 - Add ConfigList::mode to initializer list.
      Port xconfig to Qt5 - Remove ConfigList::updateMenuList template.
      Port xconfig to Qt5 - Disable ConfigList soring
      Port xconfig to Qt5 - Change ConfigItem constructor parent type.
      Port xconfig to Qt5 - Add horizontal scrollbar, and scroll per pixel.
      Port xconfig to Qt5 - Source format.
      Port xconfig to Qt5 - Remove some commented code.
      Port xconfig to Qt5 - Add(back) lineedit editing.
      Port xconfig to Qt5 - Add(back) one click checkbox toggle.
      Port xconfig to Qt5 - on Back clicked, deselect old item.
      Port xconfig to Qt5 - Fix goParent issue.
      Port xconfig to Qt5 - Update copyright.
      Add current selection check.

Source (http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc1-wily/CHANGES)