
Note editor
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The "Note" column type is for blocks of text which may contain
multiple lines (as opposed to the "String" type, which is better
suited for relatively short single lines of text).  The larger size of
the content of such columns merits its own (very simple) dialog.  Both
in the *row editor* and in the default value section of the column
editor, a Note value is shown as a button containing a note icon and
the beginning of the Note's content (as much as will fit).  To see
and/or change the full text, press this button; a full-screen text
editor dialog will appear, showing the current text of the Note.
Click "OK"/"Done" to accept any changes you have made, or cancel out
of the dialog to revert to the original content.

Note columns are treated a little specially in the *data viewer* also.
The column label for Note columns contains a note icon indicating that
it is not just a String column.  The cells in the column each show as
much of the Note content as will fit.  If you press on one of these
cells and hold for 1/2 second or longer before releasing, a read-only
version of the Note editor is shown.  Either click "OK"/"Done" or
cancel out of the dialog to return to the data viewer.
