LP1108867: i18n support for holds in record details

Rather than constructing a string of "Place hold on " + "copy", etc,
just display more complete "Copy hold" / "Volume hold" / "Issue hold"
strings that have a chance of being translatable.

Signed-off-by: Dan Scott <dan@coffeecode.net>
Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>