Bug 14316: Clarify meaning of record number in Batch record modification tool

Bug 14316: Clarify meaning of record number in Batch record modification tool

Same change as the first patch, but for the batch record
modification tool.

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 327495b5e0ec4de47d20bd27d6a1c5b88e0be191)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 3352a6ee9e7526e228f66ea420fd99709a601f82)
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>