Bug 28132: Remove "this" from button descriptions on basket summary page

Bug 28132: Remove "this" from button descriptions on basket summary page

This patch modifies button text on the Acquisitions basket page to
remove the word "this."

To test, apply the patch, go to Acquisitions, and locate a vendor with
baskets.

 - View an open basket.
 - You should see in the button toolbar, "Delete basket," and "Close
   basket."
 - View a closed basket.
 - You should see a "Reopen basket" button.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>