All log messages about moving stuff in/into/from chests described them
as "locked", whether the chests are locked or not. Remove that word,
so the messages make no claim about lockedness.
When using the form to edit a chest label, apply the edited label whenever the
form is submitted with the text field included, rather than only if the form's
specific "finished editing" button is used. This supports the natural use of
<ret> to indicate that text editing is complete, which works with other text
editing forms such as that for signs.
