LP1642337: Reporter Boolean Filters

LP1642337: Reporter Boolean Filters

The dialog controller doesn't appreciate getting
a bare boolean as a message, so if the current item
is a boolean call toString() on it before calling
the egConfirmDialog.

An <Unset> string is also added to the reporter
strings for further use, but if there are no
strong feelings re: using it, it can be dumped and
a '' used in its place.

Signed-off-by: Jason Boyer <jboyer@library.in.gov>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>
Signed-off-by: Dawn Dale <ddale@georgialibraries.org>