I should be able to mix Dates and DateTimes

(User Story, Closed -> Fixed, Priority: Critical, Test Status: Unit tested , Reported By Bad Link: Thing 3y284oe not found, )
Date and Time
Summary: Eric wants to be able to sort on _modTime for some Things, and an explicit Date for others.
The problem is that the QDate and QDateTime don't mutually coerce. This is pretty easy to fix so that you can mix them freely.