Bug 8449 - Improve wording and styling for "cancelled holds" on Holds Awaiting Pickup...

Bug 8449 - Improve wording and styling for "cancelled holds" on Holds Awaiting Pickup screen

This patch re-implements and adapts the changes dcook@prosentient.com.au
submitted in a patch which no longer applies. I have changed the
"alert" style messages to "message" style to match the style
which is applied to "hold found" messages elsewhere.

I have also revised the language in a way that I think is more
clear and accurate.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>