Code review comment for lp:~bertrand-rousseau/gtg/bugfix-1038662-dont-touch-due-date

I don't think the case Lionel talked about is solved correctly. Fuzzy dates are and should be fuzzy: you can put that something is due "now", "soon" or "someday" although the parent is due tomorrow. The user shouldn't care about what soon means - is it 7 or 14 days? Otherwise she might want to configure it => added complexity. Fuzzy dates should be transparent and not constrain any parent or child.