Bug 32141: Add missing fieldset legends and titlecase "matchpoint"

Bug 32141: Add missing fieldset legends and titlecase "matchpoint"

This patch adds missing fieldset legends and titlecases "matchpoint",
so that the "Edit" UI is consistent with the "New" UI for adding
and modifying Identity Providers.

Test plan:
1) Apply patches
2) Go to http://localhost:8081/cgi-bin/koha/admin/identity_providers.pl?op=add_form
3) Fill out the fields to add an identity provider
4) Click "Edit" next to the Identity Provider in the list
5) In a new tab, go to
http://localhost:8081/cgi-bin/koha/admin/identity_providers.pl?op=add_form
6) Compare the two screens and note that all the labels, inputs, and help text
are the same on both screens.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>