Setting .isDate = true then .isDate = false should clear hour/minute/second values

[darktrojan]

After this code:

var t = new Time({ second: 56, minute: 34, hour: 12, day: 1, month: 1, year: 2022 });
t.isDate = true;
t.isDate = false;

t.hour, t.minute, and t.second should be 0, but they aren't, because t isn't normalised at any point.

I think the best thing to do is just clear the values in the setTimeAttr special case, but I haven't yet considered the implications.