Bug 28084: Standardize: Cardnumber, Card number, Card

Bug 28084: Standardize: Cardnumber, Card number, Card

This patch modifies templates so that instances of "cardnumber" are
replaced with "card number."

Some instances where the word "card" is used by itself have been updated
to "library card" to add some context.

To test, apply the patch and view the following pages:

- Circulation -> Built-in offline circulation interface -> Submit the
  "Check out" form without entering  number. Check the alert message
  which appears.
- Go to Administration -> System preferences and enable the
  AutoMemberNum system preference and use the BorrowerMandatoryField
  preference to make card number mandatory.
  - Go to Patrons -> New patron. The hint under the "Card number" field
    should refer to "card number" instead of "cardnumber."
- Go to Tools -> Import patrons.
  - Under the page heading, the note should read "If a card number
    exists..."
  - Under "Field to use for record matching" you should see a "Card
    number" option in the menu.
  - If you try to import a CSV with an invalid card number you'll see an
    error message, "Card number X is not a valid card number."
- Under Tools -> Upload patron images, check the "image file" radio
  button. The card number field label should read "Enter patron card
  number."
- Log in to the OPAC as a patron whose card has been marked lost. Try to
  place a hold. You should see a message containing "please take your
  library card to the circulation desk"
  - On the "your summary" page you should see a message, "Your library
    card has been marked as lost or stolen."
  - Try to check out an item to this patron in the self-checkout system.
    You should be shown a message, "This library card has been declared
    lost."

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>