Bug 7684: QA Followup and bugfixes

Bug 7684: QA Followup and bugfixes

This followup fixes some QA issues:
- replace the MySQLism SQL_CALC_FOUND_ROWS
- use Koha::DateUtils instead of C4::Dates
- replace "branch" and "location" with "library"
- fixe wrong capitalisation on "Clear all" and "Select all"

and fixes some behaviors:
- the inventory tools can be used without barcode file (fixed for the
  csv export too).
- mark as not scanned a non scanned item.
- update the datelastseen 1 time per biblio (and fixes the displayed
  count)

Signed-off-by: Mathieu Saby <mathieu.saby@univ-rennes2.fr>
Signed-off-by: Koha Team Amu <koha.aixmarseille@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>