Bug 36892: Fix label for 'is_standing' input

Bug 36892: Fix label for 'is_standing' input

Test plan:

1) Go to acqui/histsearch.pl and look for "search_children_too" with
   dev tools console.
2) On 'is_standing' input, the same label is used
3) Apply this patch and reload it
4) Now it's correct

Sponsored by: BibLibre

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 40900343673c280d092de9c57399a77c113b41ba)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>