Bug 36217: Fix background jobs page's include_last_hour filter

Bug 36217: Fix background jobs page's include_last_hour filter

Test plan:
1) Create a background job
2) Go to the background jobs page
3) See your job listed
4) Unselect "include_last_hour" from the filter
5) Verify that the job is not listed
6) Apply the patch
7) perl build-resources.PL
8) Repeat steps 1-3
9) Verify that the job is now listed
10) prove t/db_dependent/Koha/BackgroundJobs.t
11) Verify that the tests pass

Sponsored-by: Koha-Suomi Oy
Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>