Bug 28438: Capitalization: Various corrections

Bug 28438: Capitalization: Various corrections

This patch makes capitalization corrections to many templates in the
OPAC and staff interface. A exhaustive test plan would be huge, so I
recommend examining the patch to confirm that it contains correct case
changes.

If you want to make it easier to examine changes you can try:
https://github.com/so-fancy/diff-so-fancy

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>