switching a window between fullscreen and normal state shrinks window under wayland

Setting a window to fullscreen and back to normal state shrinks the window by the frame size. This happens because the normal size is saved(qwaylandxdgsurface->xdg_surface_configure()) when the window decoration is already destroyed and afterwards the window size calculation (qwaylandwindow.cpp -> doResize()) is done when the decoration is created again.
So normal->fullscreen->normal shrinks the window by the frame size.