Bug 25954: (QA follow-up) Correct label "for" attribute in authorities search

Bug 25954: (QA follow-up) Correct label "for" attribute in authorities search

Change it from first select box to text input for consistancy with other
search forms

Test plan:
1) Apply the patch
2) Go to authorities search
3) Confirm the labels in all search tabs are linked to text input field

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 3b2bd038279911e8f29b376b2e70a2b9f9b6bb66)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>