Bug 16478: Translation breaks display of Checkout history in tab Checks / On-site...

Bug 16478: Translation breaks display of Checkout history in tab Checks / On-site-checkouts

To test:
- Make sure that syspref OnsiteCheckouts is enabled
- Log in to OPAC as a patron who has checkouts, online checkouts and checkout history enabled
- Go to 'your reading history' (in English)
- Display all three tabs
- Apply patch
- Reload page, display oll three tabs again, there should be no difference
- Examine source code changes to verify that the words 'checkout' and 'onsite' no longer
  will be exposed to translation.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>