Updated changelog (added qxtsortfilterproxymodel).
Updated changelog (added qxtsortfilterproxymodel).

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