Screen size test

Expected result

all consistency checks return "OK" (except the "reported value" check which might fail for min OR max upon zoom)
all the dimensions are the same (except when "fake minimal screen size" is enabled - then the "css" test shows the original value as this cannot be faked)
values do not change upon reload
upon zoom the values change
if "fake minimal screen size" is enabled resizing the window can change the value