ensure some proper initial size
ensure we start with some usable window size even if there is no stored data about it
raise initial size to 800x600 or 0.6 of available screen size
ensure we cut it with the maximal available screen size
ensure we start with some usable window size even if there is no stored data about it
raise initial size to 800x600 or 0.6 of available screen size
ensure we cut it with the maximal available screen size