eglfs: Fix updates when resizing backing store

We would resize the backing store without resizing the viewport,
which would cause all subsequent blits of the backing store to the
screen to look broken.

Task-number: QTBUG-32146
Change-Id: I65bae051b7cfbbc61fc285e4baa74685d5639569
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Mark qt5_use_modules as obsolete.

Forward-port of cb7f32f5b861fe115fa71f64500a5cbb0b643f1b (Mark
qt4_use_modules and qt4_automoc as obsolete., 2013-07-04) from
cmake.git.

Change-Id: I0c24408ef06bc93eb0e55108cf4eab2f8cbd19cb
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Clear focus if the widget being deleted is the parent's focus child.

If a widget is deleted as a result of a window activation changed then
it is possible that the parent does not clear the focus because of the
activation change. If the focus child is actually part of an embedded
widget in the graphicsview then it needs to be handled explicitly in
this case too.

Change-Id: I3e7a2b963f175828de4c19283178560abca91235
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Andreas Aardal Hanssen <andreas@hanssen.name>