Bug 15346: Translatability: fix sentence splitting issue in memberentrygen.tt

 Bug 15346: Translatability: fix sentence splitting issue in memberentrygen.tt

Fix sentences in memberentrygen.tt that are split by <strong> tags, leading to
wrong capitalization in German (because it can not be decided if a string is part
of a sentence or a standalone sentence).
Example: Es sind Keine Bibliotheken definiert.

To test:
- Apply patch
- To trigger the messages, you have to edit a patron in a system where
  no libraries and no patron categories are defined
- Alternatively, carefully review the changes in
  koha-tmpl/intranet-tmpl/prog/en/modules/members/memberentrygen.tt

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Sentences fixed for translation purposes

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>