[BUG #8311] DateFormat fails to parse 2-digit numbers with the single "w" in a mask

http://bugzilla.qooxdoo.org/show_bug.cgi?id=8311

"Tuesday 6 May 2014 19" fails to be parsed against "EEEE d MMMM yyyy w"
IMO that is incorrect as number of w's should indicate the minimum amount of
digits representing week number, so that both "Tuesday 6 May 2014 19" and
"Wednesday 1 January 2014 1" should be parsed
In fact that is how "d" works.

Actually, following this logic both "ww" and "dd" should not allow 1-digit
values the way they do now