Bug 21634: Keep "circulation" module selected when viewing patron's logs

Bug 21634: Keep "circulation" module selected when viewing patron's logs

To recreate:
- View a patron detail page
- Click "Modification log"
- Notice that the url has "modules=MEMBERS&modules=circulation", but
the "Circulation" option is not selected in the "Modules" dropdown list.
This is because of uppercase vs lowercase.

The bug:
- Right after you click "Modification log" you will see all the
"members" and "circulation" logs
- Submit the form without changing any input/select from the form
=> Now you only see the "members" logs.

Test plan:
- Apply the patch
- Click "Modification log"
- Notice that the url now contains "modules=MEMBERS&modules=CIRCULATION"
- Submit the form without changing any input/select from the form
=> Now you have the "members" and "circulation" modules selected.

Signed-off-by: Pierre-Marc Thibault <pierre-marc.thibault@inLibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>