Added QxtScreenUtil to gui.pri.
Added QxtScreenUtil to gui.pri.

hrobeers/qxtweb-qt5,mmitkevich/libqxt,mmitkevich/libqxt,mmitkevich/libqxt,hrobeers/qxtweb-qt5,hrobeers/qxtweb-qt5,hrobeers/qxtweb-qt5,mmitkevich/libqxt,hrobeers/qxtweb-qt5