Clean up and refine serial note support, part 1

Clean up and refine serial note support, part 1

This commit fixes a number of minor problems with serial notes:

1) Serial notes are currently returned in "random" (database)
order.  Adding a create_date sort is a sensible default.

2) If you have many notes, they start to display in a squashed and
unreadable fashion.  Switching from a groupbox to a styled vbox
provides a simple workaround.

3) It is currently impossible to display newlines in notes.  We can
deal with this by changing the display style.

Signed-off-by: Dan Wells <dbw2@calvin.edu>