Bug 26334: Move translatable strings out of members-menu.inc into members-menu.js

Bug 26334: Move translatable strings out of members-menu.inc into members-menu.js

This patch moves translatable strings out of members-menu.inc into
members-menu.js where they can be translated using the double-underscore
i18n function.

To test, apply the patch and go to Patrons.

- Expand the search options in the search header by clicking the [+]
  link.
- Select "Date of birth" from the "Search fields" dropdown.
  - A tooltip should appear above the search form, "Dates of birth
    should be entered in the format..." with your current date format.
- Remove all "Adult" type patron categories but one.
  - Check out to a child patron.
  - From the "More" menu choose "Update child to adult patron."
  - You should see a confirmation.
- From the checkout screen, from the "More" menu, choose "Renew patron"
  - You should get a confirmation.

TESTING TRANSLATABILITY

- Update a translation, e.g. fr-FR:

  > cd misc/translator
  > perl translate update fr-FR

- Open the corresponding .po file for JavaScript strings, e.g.
  misc/translator/po/fr-FR-messages-js.po
- Locate strings pulled from
  koha-tmpl/intranet-tmpl/prog/js/members-menu.js for translation,
  e.g.:

  msgid "Are you sure you want to renew this patron's registration?"
  msgstr ""

- Edit the "msgstr" string however you want (it's just for testing).
- Install the updated translation:

  > perl translate install fr-FR

- Switch to your newly translated language in the staff client
  and repeat the test plan above. The translated strings should
  appear.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>