Remove qFill usages from uic

QtAlgorithms is getting deprecated,
see http://www.mail-archive.com/development@qt-project.org/msg01603.html

Change-Id: I58d0c78609381b20ffe8a68e36c8216689362ed5
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Fix QWindow::moveEvent documentation

It handles window movement events, not mouse move events.

Change-Id: Ibc8fd0272756fcf87dfac210addbf2f87cfb39d5
Reviewed-by: aavit <eirik.aavitsland@digia.com>