Used proxy object in QUiLoader loaded widget to avoid cyclic reference.
Used proxy object in QUiLoader loaded widget to avoid cyclic reference.

Reviewer: Hugo Parente Lima <4149ba590530c5cd07e8f8a561f4e06e17776179@gmail.com>
          Luciano Wolf <luciano.wolf@openbossa.org>

BadSingleton/pyside2,RobinD42/pyside,RobinD42/pyside,qtproject/pyside-pyside,M4rtinK/pyside-android,qtproject/pyside-pyside,enthought/pyside,M4rtinK/pyside-bb10,RobinD42/pyside,IronManMark20/pyside2,RobinD42/pyside,M4rtinK/pyside-android,enthought/pyside,M4rtinK/pyside-bb10,PySide/PySide,M4rtinK/pyside-android,M4rtinK/pyside-bb10,qtproject/pyside-pyside,pankajp/pyside,BadSingleton/pyside2,RobinD42/pyside,pankajp/pyside,gbaty/pyside2,pankajp/pyside,BadSingleton/pyside2,gbaty/pyside2,IronManMark20/pyside2,gbaty/pyside2,PySide/PySide,M4rtinK/pyside-bb10,PySide/PySide,BadSingleton/pyside2,M4rtinK/pyside-bb10,IronManMark20/pyside2,enthought/pyside,enthought/pyside,BadSingleton/pyside2,IronManMark20/pyside2,gbaty/pyside2,enthought/pyside,M4rtinK/pyside-android,gbaty/pyside2,pankajp/pyside,enthought/pyside,IronManMark20/pyside2,RobinD42/pyside,M4rtinK/pyside-bb10,qtproject/pyside-pyside,RobinD42/pyside,M4rtinK/pyside-android,PySide/PySide,M4rtinK/pyside-android,pankajp/pyside,qtproject/pyside-pyside,enthought/pyside,PySide/PySide