Bug 36334: (follow-up) Restore selection of previous values in sidebar

Bug 36334: (follow-up) Restore selection of previous values in sidebar

Before and after the first patch the values for category and library were not populated

To test:
1 - With nothing applied search in the top bar, clicking the 'settings' button
2 - Select a search field, search type, category, and library
3 - Perform search, note only search field and search type are populated
4 - Apply first path, repeat, same result
5 - Apply this patch, repeat
6 - Confirm all four fields now populate in sidebar

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>