Bug 20212: (QA follow-up) Remember current filter

Bug 20212: (QA follow-up) Remember current filter

This patch restores the original behaviour: if you jump into receiving
an order, and then go back to receiving, you want the page to remember
your filters.

This feature was overlooked. On fixing it, I wrapped some JS code in a
function for reusing it and simplified it a bit as well.

To test:
1. Enter a search term in either of the search fields
2. Add a note, receive or do another action
=> SUCCESS: The search term is kept
3. Apply this patch set
4. Repeat 2
=> SUCCESS: The search term is kept

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>