Bug 12639 - Z39.50 administration page should use "message" dialog for adds and updates

Bug 12639 - Z39.50 administration page should use "message" dialog for adds and updates

This patch changes the style of a couple of message boxes to use the
"message" style instead of the "alert" style. This better reflects the
type and priority of the messages being displayed.

To test, got to Administration -> Z39.50 client targets and edit an
existing server. The confirmation message should be the blue "message"
type.

Test again by adding a new server. The confirmation message for this
operation should be of the same blue "message" type.

Signed-off-by: Petter Goksoyr Asen <boutrosboutrosboutros@gmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Small template change, tested ok.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>