Bug 36380: Add filter value on patron statistics report summary

Bug 36380: Add filter value on patron statistics report summary

Test plan:
1) Go to reports and select "Patrons"
2) Select some filters (patron category, library,..) and run it
3) Normally you will see filters selected but with blank value like
   "branch code = "
4) Apply this patch
5) Refresh

Sponsored by: BibLibre

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
Signed-off-by: Emily Lamancusa <emily.lamancusa@montgomerycountymd.gov>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>