Doc: Clarified members of QtQml.Models submodule.

-Took out  members of QtQml.Models submodule from Qt QML and Qt Quick.
-Set up qdocconf files to include QtQml.Models to be part of Qt QML
 doc build.
-Edited the sentences to make it clearer that list and model types
 are in QtQml.Models.
-Placed the Visual* types back to QtQuick 2 module.

-This patch removes several collision pages.

Change-Id: I16e7045162af6852e5d6c3162b6f4cf97a42402b
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
qmlscene: if top-level is a QQuickWindow, set incubation controller

The necessity for this is documented in the
QQuickWindow::incubationController() accessor.  Bug 31203 is about
writing a custom main() with a QQmlApplicationEngine, not about
qmlscene, but the same workaround is necessary for both.  Hopefully
soon we find a way to make it unnecessary, but for now it is.
This fix also doesn't take care of the QtObject { Window { } }
use case.

Task-number: QTBUG-31203
Change-Id: Ic9a5e4a23ac918593138dc9cab3de6cd36453eaf
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Stabilize tst_qquickanimatedimage::mirror_notRunning()

Task-number: QTBUG-31370
Change-Id: I200d94dccd1314c891df92576b0d2b704e530e16
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>