Attempt to make correct plugin

Conflicts:
	qglgui/internal/qtplugin/CMakeLists.txt
	qglgui/internal/qtplugin/uiintegration.cpp
	qglgui/internal/qtplugin/uiintegration.h
	qglgui/internal/qtplugin/uiworker.cpp
	samples/shared_qt/basicqtapp.cpp
Fix black screen issue
Remove unneded code.