Bug 28481: Make 'to' date inclusive.

Bug 28481: Make 'to' date inclusive.

Test Plan:
1) Sell an item
2) Cash up to make the sale historical
3) Search "Older transactions" with both dates being the current date,
   click "Display" to search
4) Note you get no results
5) Apply the patch
6) You should now see your transaction

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