fix clearing of alt_pressed on windows alt-tab
fix clearing of alt_pressed on windows alt-tab

vizorvr/patches,vizorvr/vizor,vizorvr/patches,vizorvr/vizor,vizorvr/patches,vizorvr/vizor-create,vizorvr/patches,vizorvr/vizor-create,vizorvr/patches,vizorvr/vizor,vizorvr/vizor-create